Knob can be pushed in when not in use. The push knob assures safety and has a sleek looking appearance.
The black plastic portion sits on the rear surface of the door or, for thicker doors, can be mortised/counterbored into the rear surface. The neck portion is inset into the door, up to the thin flange, so the mechanism is only 4mm proud on the door surface - just over 1/8" with the knob in the recessed position.
Knob protrudes a total of 19mm (3/4") when released
Door thickness from 15 - 35mm (5/8" to 1-3/8"); door up to 25mm (1") thick with no counterbore required
Zinc alloy, ABS plastic