Made of 45 steel and has a long service life.it has high hardness and is not easy to deform. The clamp screw allows the piston rings pliers to be fixed into the cup of the piston for improving pulling power and disassembling the brake piston. Ergonomics and convenience that these Motorcycle brake caliper piston puller provide, they are indeed time-saving and labor-saving. Suitable for Motorcycle is not just for professional riders and mechaanics, but for the everyday rider mechanic as well. easy-to-operate design combined with its high work efficiency ensures that your motorbike brake piston repairs are as smooth and hassle-free as possible.