Hand knob: Technopolymer plastic (Polyamide), black matte
design plastic cylindrical knobs.
The use of EN 519.1 eliminates the need for a thread on the
These cylindrical handles are driven over a lever using a plastic
mallet. The shaft end should be slightly rounded or chamfered
In order to increase the elasticity, the bore is fitted with
longitudinal ribs which provide a very firm seating of the handle
onto the shaft.