Aggressive Ring Box Opener — Finger Blade
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Sleek finger-worn box opener with aggressive tapered blade and comfortable ring grip. Single beveled cutting edge.
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Model information
- Source
- Printables
- Category
- Tools
- License
- Creative Commons — Attribution — Share Alike
Description
A sleek, aggressive finger-worn box opener designed for one-handed package opening. Hook, pull, done — no fumbling, no searching for a blade.
Design
The blade sweeps to a fine point with a single beveled cutting edge on the underside. The top spine stays blunt for safety. The ring sits comfortably on your index or middle finger, keeping the tool secure while leaving your hand free. The organic transition from ring to blade flows smoothly with no hard edges to catch on pockets or skin.
Features
Finger-worn design — stays on your hand, always ready
Single beveled edge — sharp where it matters, safe everywhere else
Aggressive profile — mean look with functional sweep for hooking tape
Lightweight — ~4 g, barely noticeable during use
No supports — print flat, blade along X-axis
Parametric ring — adjust inner diameter for your finger size
Dimensions
Table
Feature | Value |
|---|---|
Ring inner diameter | 24 mm (adjustable) |
Ring outer diameter | 36 mm |
Blade length | 45 mm |
Overall length | 70 mm |
Thickness | 6 mm tapering to 0.5 mm at tip |
Weight | ~4 g |
Print Settings
Table
Setting | Value |
|---|---|
Material | PLA or PETG |
Layer height | 0.2 mm |
Walls | 2 |
Infill | 15% |
Orientation | Flat on bed, blade pointing along X or Y |
Supports | None |
Tips
Scale ring ID up or down 5–10% for different finger sizes
Print a few in different colors to match your mood
PETG recommended for durability if opening heavy boxes daily
The tip is thin — handle with care, it will flex but shouldn't snap
Safety
This is a cutting tool. The edge is sharp. Keep away from children. Store in a drawer or hook on a keychain when not in use.