Item Type: Chain Breaker_x000D_Material: Iron_x000D_Gross Weight: 300g/10.6oz_x000D_Product Color: Black_x000D_Thimble Diameter: 3.8mm/0.15in_x000D_Slot Width: 33mm/1.3in High Hardness Alloy Thimble: The thimble of this chain breaker is made of high hardness alloy so that it strong and has reliable quality. Sleek Design: Our chain remover tool adopts sleek design that is easy to use and it will not easily hurt your hands. With Fixed Slot: There is fixed slot to prevent disconnection which is a very considerate design and it is universal tool for removal chains. 3.8mm Thimble Diameter: The diameter of the thimble is 3.8mm and the slot width is 33mm. And due to the black color, it is not easy to get dirty. Operation Steps: The four steps of its usage first, determine the size of the chain and adjust the hex nut, then align the thimble with the center column and tighten it. Next screw it inward and push out the center pillar with thimble. Finally, eject the center column that can be disassembled.1 xChain Breaker