MULTIFUNCTION 4-1: Spurtar Brake Caliper Compression Tool is ideal for automotive brake pump adjustment. Works on single piston, dual piston and quad piston, as well as single and twin piston floating calipers. This item is for disc barke, not for drum brake.,RATCHETING: Automotive brake caliper centrally located ratchet screw creates even force when compressing pistons to ensure proper alignment and to prevent damage to your brake components,360-DEGREE RATCHETING: Ratchet technology of this Brake Caliper Tool provides a 360-degree swing that allows you to keep the compression plates in place while you lever the handle back and forth to spread or retract the plates,EASY TO USE: This caliper piston tool extended reversing lever allows for easy change from spreading to retracting. Cushioned grip handle provides comfortable and easy grip,BUILT TO LAST: Constructed of carbon steel, the ratcheting screw and pad plates are designed for maximum strength and durability, which is an useful brake tools for automotive replacement brake system parts