Fixed caliper: • Twin piston • Quad piston Floating caliper: • Single piston • Twin piston Features: • Prevents damage to pistons, hubs or calipers • Ensures parallel piston retraction on dual and quad piston calipers. • Easy left and right side use • Designed to retract the toughest caliper pistons • Single lever mechanism used to apply and release force for ease of operation and faster service.