Skip to content
SteadGrip polish cap prototype: a ridged, oversized grip mounted on a standard polish bottle.

Hard Goods

SteadGrip

Ergonomic nail care for hands with limited grip: an oversized ridged cap that replaces the small factory cap on a polish bottle, and a nail file with a grip block, tested with older users.

Category
Hard Goods
Year
2026
Duration
4 weeks
Role
Solo
Course
RISD Industrial Design
Tools
Foam modeling, Clay, 3D printing, Rhino
Materials
Foam and clay form studies, 3D-printed prototypes

The problem

Painting or filing your own nails takes a pinch grip and steady fine control. For people with arthritis or reduced strength, a polish cap the size of a pencil eraser and a flat emery board are hard to hold and harder to control.

I set out to change the grip, not the routine: the same bottle and the same file, with a form that fits a whole hand.

Starting point: hands with bent joints and limited grip strength.

Form studies

I made four grip forms in foam and clay, each glued to a file blank so they could be held and used: a rounded wedge, a trapezoidal block, a D-shaped handle with a finger slot, and a two-pronged saddle. Each one favors a different way of holding: pinch, overhand, fist, palm.

Four grip forms mounted on file blanks for hand testing.
How each form sits in the hand: pinch, overhand, fist and palm grips.

Testing

Testing the file grip with an older user. Background simplified in editing.AI-assisted render

The cap

The polish cap took the saddle form: a ridged grip that a whole hand can close around, mounted on the bottle's own cap.

The cap in hand. The ridges give the fingers something to lock into while the bottle stays upright.
The cap alone on a standard 9.7 mL polish bottle.