Sturdy Steel Material - The automotive brake caliper compression tool is made of solid steel for strength and durability. The surface of the tool is coated with coating, which is beautiful and not easy to rust. The steel material can withstand high pressure and friction to maintain the stability and longevity of the tool during use. . - The car brake caliper tool is very simple and easy to use. Place the tool into the brake cylinder bore and rotate it clockwise or counterclockwise with a 3/8" square drive accordingly to rotate the disc brake piston back into the cylinder bore, which makes it easy for you to complete the piston adjustment. . Excellent Performance - The caliper piston compressor tool has excellent working ability and is mainly used to rotate the piston back into the cylinder bore when installing brake pads. By rotating the piston, the brake pads can be installed quickly and accurately to maintain the normal operation and performance of the brake system. . Size Description - The size of the caliper piston tool is 1.3×1.12×1.27 inches, it can be used on vehicles equipped with 4-wheel disc brakes. The special disc piston tool with 6 unique bit configurations to grip the caliper piston. An indispensable component of the brake system, easy to install and you can easily operate it. . Widely Applicable - Widely applicable to different brands and models of automotive brake systems. Please make sure the tool fits your vehicle before purchasing, so you can have a satisfying shopping experience. Every part undergoes professional testing and inspection before leaving the factory, so you can use it with confidence.