I designed this for my own use, I'm an C5 quadriplegic, so my hands and fingers are quite shittyshittybangbang, can't get grip of anythin heavy or slippery. This can be used to lift lid with your thumb. When printed with PLA, or PETG, you can´t leave the tool on the knob.
Lid knob max. width: 60mm
Lid knob min. width: 40mm
In Finland you can buy this pre printed from HJ Visions, (contact:email@example.com).
I´m very thankfull of feedback and feel free to tip the designer, if you think that design is worth it.
Real PLA / PETG
Printed in PLA: