Card width 50mm, thickness 4mm, maximum range 40-70mm 【Function】: This brake piston compressor wrench is mainly used to push back the brake piston, replace the brake pads, repair and install the car brake cylinder, it is an essential car gadget for garage and personal repair, very practical. 【Material】: Our brake piston compressor wrench is made of carbon steel, which is strong, corrosion-resistant and sturdy. There is a rubber sleeve on the handle, easy to use, comfortable in the hand, not easy to fatigue for a long time, and improve work efficiency. 【Wide Fit】: Perfect for most brake caliper ratchets, four-piston calipers for trucks and commercial vehicles equipped with dual and four-piston fixed calipers or single and dual piston floating calipers. Please note that this ratchet saddle spreader "pushes back" the piston, it cannot twist and compress at the same time, which is necessary for some brakes. 【Professional Tool】: This heavy-duty carbon steel brake caliper press is designed