Acts as a normal volume or tone control, and pulls up to activate its on/on double-pole double throw mini switch. Controls pickup phasing, series/parallel switching and coil-taps- Split shaft with coarse knurling. One mounting nut and flat washer included. Measures metric for Japan, China or Korea Guitars! 

Measures:

Total pot depth - 44 mm

Length of threaded shaft - 17 mm

Shaft diameter - 6mm