Finger-worn jump-ring opener — 3D-printable model preview

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Crafts & making Simple

Finger-worn jump-ring opener

Open jump rings with one pair of pliers

An open ring worn on the index finger with two slots on its crown: hold a jump ring in one slot and twist it open sideways with pliers in the other hand. One tool replaces the second pair of pliers, and the twist keeps rings round instead of pulled apart.

Customize this model

Size: 27 × 32 × 7 mm
Shape: Custom outline
Walls: 2.0 mm
Volume: 2.3 cm³
Est. weight (PLA): 2.8 g
Parts to print: 1
Category: Crafts & making
Made by: Krypto
Built in: 3 steps

What’s in it

Custom outline, 27 × 32 × 7 mm, with 2.0 mm walls
Custom outline traced from a shape

How to print it

Print in PETG; the split ring adjusts to the finger.

Prints as shown on its outline, no supports.

Filament: at most about 2.8 g of PLA printed solid (roughly $0.06 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).

Questions

What size is the finger-worn jump-ring opener model?

The finger-worn jump-ring opener model measures 27 × 32 × 7 mm (width × depth × height). You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Print in PETG; the split ring adjusts to the finger. Prints as shown on its outline, no supports.

How much filament does it use?

At most about 2.8 g of PLA (2.3 cm³ printed solid), roughly $0.06 of filament at $20 per kg. Normal infill uses less.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.

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Make it fit your space

Change the size, walls, dividers, holes and labels of the finger-worn jump-ring opener model in your browser, then download it for your printer. Free, no CAD needed.

Customize this model