These Fully machined aluminum knobs are designed after the knobs found on the Ferrari 488 Challenge Race Car. The finned dial design of this particular knob makes it easily usable whether you wear gloves or not by giving a solid tactile feel. The design of the PSK_0001 has been optimized for Sim Racing use and will allow up to 12 positions without ANY sectional overlap in the display opening, higher detent rotations can be used with minimal overlap in display and has been tested with numerical indicators up to 20 positions. These knobs can be installed on any 6mm or 1/4" encoder or rotary switch. The PSK0001 is a set screw mounted knob.