The Centralab R2-32 Fastatch is a rear volume control component designed for modular potentiometer assembly in vintage electronics. This unit features a C1 taper specification and a control base diameter of 15/16 inch (7/8 inch). It utilizes an overall shaft length of 4 1/4 inches, featuring a 1/4-inch flat inner shaft alongside outer shaft sections measuring 3 1/4 inches round near the upper top and 1 inch round near the bottom.