PAUL Component Engineering Klamper mechanical disc brake calipers are 100% designed, tested and manufactured in Chico, CA. Actuator Arms can be swapped out between long pull, short pull, and Campagnolo pull. Machined in the USA of 6061 aluminum. Three hardened steel pins to locate the pad actuator. Flat needle roller thrust bearing for smooth action. Tried and true ball bearing in a ramp system. Includes KoolStop sintered disc brake pads and mounting hardware.