Supercrazy 3/8" Disc Brake Piston Caliper Wind Back Cube Tool SF0134 PRACTICAL DISC BRAKE PISTON TOOL -- Use the 3/8" Disc Brake Piston Remover Tool for changing your rear disc brake pads or rotors; Removes and installs disc brake pistons; Realigns piston slots (where applicable) to back of brake pad; Rotates piston back into caliper. 3/8-Inch DRIVE FOR MOST CARS -- Use with a 3/8-inch square drive ratchet to rotate the pistons back into the cylinder, can fit rear disc brake piston on most cars and light pickup trucks. HOW THE BRAKE PISTON WORK -- This cube tool rotates pistons back into brake calipers when replacing brake pads on vehicles with rear wheel disc brakes; It removes and installs disc brake pistons, realigns piston slots to the back of the brake pad, and rotates the piston back into the caliper. STRONG CONSTRUCTION & DURABLE TO USE -- The whole brake body is made from carbon steel,very sturdy and durable for extra strength and longevity, and you can use it on many universal vehicles with 4 wheels. EASY TO USE -- An indispensable component of brake system, easy to install and you can operate it easily. Can be used on universal vehicles with 4 wheel disc brakes, fit most domestic and some import applications.