Four-lobe knob

Handwheel 4-point in aluminum with blind plain hole and polished surface.

Handwheel 4-point in aluminum with blind threaded hole and polished surface.

Handwheel 4-point in aluminum with through threaded hole and polished surface.

Knob 4-point in black Duroplast with zinc-plated steel insert and blind threaded hole.

Knob 4-point with threaded zinc-plated steel stud.