SONBODA Dan from KRW 1,500,000 · By appointment only | Book a fitting

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See the price first, decide after you try it on

From KRW 1,500,000

Book a fitting

Try it on in person, and if it fits, you can buy it the same day.

Functional finger prosthesis · SONBODA

Possibility, back at your fingertips

Made for people who have been living with the inconvenience of a finger amputation.
We'll walk with you on the way back to gripping, writing and working again.

See SONBODA Dan Book a fitting

Consultations and fittings are led by our CEO, a board-certified physician in occupational and environmental medicine

  • 7.8gWeight incl. fitting kit1 universal-size unit + 2 kits · in-house measurement
  • 1.5M KRWBase product priceCheck the price first, decide after trying it on
  • 60minConsultation per visitOne visitor at a time · by appointment
  • MDLed by our CEOConsultation and fitting in person

For everyday movements

Who a finger prosthesis can help

Start with the movements you need help with, then check whether the product suits your hand.

  • Finding it hard to hold things

    Holding and keeping a grip on things like cups or handles is uncomfortable.

  • Needing fine hand movements

    You often use a keyboard, small objects or precise tools.

  • Struggling with buttons and zippers

    Using your fingertip is hard when dressing or picking up small parts.

  • Using your hands a lot

    You use your hands repeatedly for work, study or hobbies and want to compare how you perform those movements.

We also check discomfort and fatigue in the fingers you've been using instead.
Suitability and results vary from person to person.

Simple structure, real movement

SONBODA Dan

Powered not by electricity, but by your own movement.

  • SONBODA Dan is a mechanical finger prosthesis with no electronics.
    It moves together with your remaining finger.

  • When you bend the middle joint of your finger,
    the linked structure moves the prosthesis with it.

  • Designed for the index, middle, ring and little fingers
    where the fingertip segment has been amputated.

  1. 1

    Bend your remaining middle joint

  2. 2

    SONBODA Dan moves with it

SONBODA Dan on a grey background: a black mechanical structure with linked segments
1.The product
SONBODA Dan worn on a finger, pinching against the thumb
2.Worn

Eligibility

We check your middle joint and remaining length

  • For fingertip-segment amputations of the index, middle, ring or little finger.
    SONBODA Dan is not for the thumb.
  • The middle joint of the finger must be intact, and you must be able to bend and straighten it fully on your own.
  • At least 2 cm of remaining finger length is required.
    Exact measurements and final suitability are confirmed at the fitting consultation.
  • It can be worn on more than one finger; we check each finger's condition separately.

If you still have post-surgical swelling, little or no movement in the middle joint, or an undiagnosed skin lesion, your condition needs to be checked before a fitting consultation.

Weight and fit

7.8g

About 7.8 g, including the fitting kit.
Measured with one universal-size unit and two silicone fitting kits.

In-house measurement · Weight varies with product size and fitting setup.
This is not the average weight across all products.

Top view of gloved hands fitting SONBODA Dan onto a finger
Staged photo of the fitting process.

From choosing a size to fine-tuning the fit.

  1. 01
    Try it onWe find the size that fits your hand from our ready-made products.
  2. 02
    Check fit and holdWe check for slipping or discomfort as you bend and straighten.
  3. 03
    Fine-tuneWe adjust the fitting kit, then check movement and comfort again.

Materials and testing

We test the structure and verify the materials

01 / In-house load tests

Separate tests for the joints and for real-use conditions.

Joint load test
A hand wearing SONBODA Dan lifting a heavy equipment case by its handle with one hand
One-hand lift test

We applied force to the joints with a push-pull gauge, and checked for breakage while lifting a heavy object straight up with one hand.

About 70 N on average per joint
Reported from in-house testing with a push-pull gauge.
Averaged across the four joints, each joint withstood a momentary force of 70 N.
A 20 kg object lifted straight up with one hand
In-house observation that no breakage occurred under this condition.

This does not represent the load capacity of a single prosthesis or a safe lifting weight for users.
Please do not attempt to repeat these tests.

02 / Materials

Resin for the body, silicone for the fit.

Body resinISO 10993-5 · 10
Biocompatibility tests met

Testing lab summary report · 2020

Fitting kit siliconeFDA 21 CFR 177.2600
Extractables test passed

SGS Korea test report · 2022
Body resin · meets ISO 10993-5 and 10993-10
The body uses a resin that, according to a testing laboratory report, met the requirements of ISO 10993-5 (cytotoxicity) and ISO 10993-10 (irritation and skin sensitization).
These results are for resin samples, not for the finished SONBODA product.
Silicone fitting kit · passed US FDA 21 CFR 177.2600 extractables test
The raw silicone used in the fitting kit received a PASS in SGS Korea testing (2022) for extractables under US FDA 21 CFR 177.2600 (rubber articles).
These results are for raw-material samples. They are not an FDA certification and not a test of the finished SONBODA product.

Fitting and movement comparison

A physician guides you, from fitting to movement comparison

Book a fitting
Gloved hands placing SONBODA Dan on a client's finger
Staged photo of the fitting process.

Our CEO, Hyeran Choi, a board-certified physician in occupational and environmental medicine, leads every consultation and fitting in person.
We identify the movements your hand needs and compare the difference before and after wearing it, in numbers and in how you use your hand.

Hand check → Baseline test → Fitting & practice → Retest

Time and success
We compare results on the same tasks with and without the prosthesis.
How you use your fingers
We look at changes in pinching and compensatory movements.
Pain, fatigue and effort
We also record any discomfort you feel during the tasks.

We use hand-function tasks based on the Jebsen–Taylor test.
A single before-and-after comparison can be affected by practice and adaptation, and we also record results that show no improvement or more discomfort.
This process does not demonstrate long-term pain reduction or arthritis prevention.

See the price first, decide after you try it on

Try it on, and buy it the same day if it fits

Try on our ready-made products, get them fitted to your hand, then decide.
If a product fits, you can buy it without waiting for production.

A gloved hand choosing one SONBODA Dan from a white display tray sorted by size

SONBODA Dan · Base product price

1.5M KRW

KRW 1,500,000. This base price does not require consent to marketing or research participation.

Book a fitting
What the price includes and optional participation benefits

The pricing unit, taxes, and what basic fitting and components are included will be announced once finalized.
Fees for consultation visits and trials, and terms for buying multiple products, are yet to be finalized.

Discounts for marketing participation and compensation for research participation will be announced under separate terms.
You can buy at the base price without taking part.

Same-day purchase is only possible once suitability, fitting and stock availability are confirmed.
If further adjustments, condition checks or stock are needed, same-day purchase may not be possible.

A growing product line

SONBODA, for more kinds of fingers

Starting with SONBODA Dan, we are preparing products for other amputation levels and for the thumb.

  • Available now

    SONBODA Dan

    For fingertip-segment amputations of the index through little finger.

  • In development · planned for H1 2027

    SONBODA Jang

    A follow-up product for amputations of two or more segments.

  • In development · planned for H1 2027

    SONBODA Mu

    A follow-up product for thumb amputations.

Plans may change depending on development and validation schedules.

Book a visit

Book a fitting

We take one-hour appointments Monday to Friday, 9 am to 5 pm Korea time (KST).
We keep lunchtime (12 pm to 1 pm) free.

  1. 1Choose a timePick the date and time you'd like.
  2. 2Leave your detailsTell us how to reach you and a little about your hand.
  3. 3KRW 10,000 depositTransfer it to the account shown right after you submit. It comes off the price if you buy, and is refunded if you don't.
  4. 4ConfirmationOnce we receive the deposit, we'll contact you to confirm.
Date Loading available dates…

Available Unavailable or full

Time 1-hour slots, KST

Please choose a date first.

Your details
We'll use this number for deposit details and to confirm your booking.
Before your consultation
How are you getting by right now?
Which movement is hardest for you?
What do you think of the KRW 1,500,000 base price?

Collection and use of personal information

  • What we collect: name, phone number, email (optional), appointment time, and your answers above
  • Why: to confirm your visit, send deposit details, and contact you about confirmation or changes
  • How long: deleted without delay once these purposes are fulfilled
  • You don't have to agree, but without consent you can't book online. You can still book by phone or email.
Selected time Not chosen yet

The KRW 10,000 deposit comes off the product price if you buy, and is refunded if you don't.
If you cancel or change your booking by 5 pm (KST) the day before your visit, by phone, email or KakaoTalk channel, we'll refund it. If you cancel later or don't show up without notice, it isn't refunded.

SONBODA Center · Ansan, Gyeonggi-do

SONBODA Finger Prosthesis Center

Book a fitting
Inside the SONBODA Center: finger prosthesis products on a white display stand under an illuminated SONBODA sign
Fitting SONBODA Dan onto a finger at a consultation table with a SONBODA logo sign
Staged photo of the fitting process.

Location

Room 206, 104-14 Yeonsuwon-ro, Danwon-gu, Ansan-si, Gyeonggi-do, Republic of Korea
See Naver Map for the exact location and directions.

View on Naver Map ↗

Hours

By appointment only · 60 minutes per visit
Mon–Fri 09:00–17:00 KST (lunch 12:00–13:00)
Consultation · fitting · movement comparison

Contact

+82 10-5959-1002

info@banzo.co.kr

Please visit after you receive our booking confirmation.

Before you visit

Things to know before you buy

Can anyone with a fingertip-segment amputation use it?

No.
Your middle joint must move well enough and your remaining finger length must meet our criteria.
We assess suitability after checking swelling, skin condition and how the product actually fits.
See "Eligibility" above for the conditions.

Does it reduce pain or prevent arthritis?

Pain reduction and arthritis prevention with SONBODA Dan have not been clinically proven.
The trial looks at differences in how you use your hand and how comfortable it feels, but it does not replace diagnosis or treatment of pain.

When can I buy SONBODA Jang and SONBODA Mu?

SONBODA Jang and SONBODA Mu are in development, with release targeted for the first half of 2027.
They are follow-up products for amputations of two or more segments and for the thumb. Detailed eligibility will be announced at release.
Plans may change depending on development and validation schedules.

Can I visit without an appointment?

To give each visitor a full 60-minute consultation, we work by appointment only.
Request a booking on this page and transfer the KRW 10,000 deposit. We'll confirm once we've received it.
You can also book by phone (+82 10-5959-1002) or email (info@banzo.co.kr).

How does the deposit work?

The deposit is KRW 10,000.
When you finish your booking request, the deposit account appears on screen right away.
Once we receive your transfer, we'll confirm your booking.

  • If you buy after your visit: KRW 10,000 comes off the product price.
  • If you don't buy after your visit: we refund it in full.
  • If you cancel or change by 5 pm (KST) the day before, by phone, email or KakaoTalk channel: we refund it in full or move it to a new date.
  • If you cancel later or don't show up without notice: it isn't refunded.

Refunds go back to the account you paid from. If you visited, we send it by the day after your visit.

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