Material: High Carbon Steel, Compound Strengthening.Made of high-quality steel with blackening and hardening treatment to the tool's high strength and toughness and good wear resistance, and avoid fracture and deformation. Wide application:The chain breaker has a wide range of applications and can be used to cut chains in bicycles, motorcycles, ATVs, go karts and engines. : Universal Chain Breaker Tool Replaceable Press Pin is Heat Treated And Hardened.This Roller Chain Breaker Tool is used for chain size #25-60. You can easily cut chain into the length your need without any other tools. It is totally hassle-free for cutting chain. It is the perfect tool for cutting chain because it will protect the chain from possible damage that occurs during the cutting process. Tips: Do not run the chain too tight, it will grind the sprocket teeth down in a short period of time. How to replace a roller chain: 1.Find the chain on you old chain. 2.Turn the handle to bring the from breakers jaws. 3.Turn the chain breaker to push the rivet out of the chain. 4.Apply pressure slowly to each rivet,auddenly applying excessive pressure to the rivet will cause the connecting rod to bend and damage the chain. Material: 45 steel Color: Black Applicable chains: 25, 35, 41, 40, 50, 60, 05B, 06B, 08B, 10B, 410, 43, 65, 415, 42, 415H, 420, 423, 428, 28H, 520, 530, 25H, 40H, 50H, 60H, C2040, C2042, C2050, C2052, C2060, C2062, A2040, A2050, A2060 Package Contents: 1x Chain Breaker Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.