Exclusive custom pulley designed for use with 2L V-belts. 6061-T6 aircraft-grade Aluminum. Pulley interlocks with Bar to better transmit power and reduce shear forces on screws. Drilled for two 8-32 Flat Head attachment screws. (2) 8-32 X 7/8” Flat Head Socket Machine Screws included. This part is used on the Spinner Bar of the KINETIC kit.usa

Uses a 3/32” hex wrench.