Paul Components Engineering Flat-Mount Klamper Disc Caliper Stops A Lot The Paul Components Engineering Flat-Mount Klamper Disc Caliper has an actuator arm that can be swapped out between short pull and Campagnolo pull. It is machined from 6061 aluminum in the USA and heat-treated with12L14 steel. It features three hardened steel pins to locate the pad actuator, a flat needle roller thrust bearing for smooth action, tried and true ball bearings in the ramp system, and includes Kool Stop sintered disc brake pads. Features Machined in the USA of 6061 aluminum and heat-treated 12L14 steel Flat needle roller thrust bearing for smooth action Includes Kool Stop sintered disc brake pads for reliable stopping power | Paul Components | Component Engineering Flat-Mount Klamper Disc Caliper Black