Bicycle Chain Tool, Bike Chain Removal and Installation Tool Bike shop level tool , designed to quickly and accurately remove and install chain pins High Quality and easy to carry Durable Steel Construction , it features a handy "loosening shelf " to remedy stiff links after reassembly. The fine thread and comfortable size enable the removal of the toughest chain pins like a breeze Chain sits in the joint snugly and takes little torque to pop the pin out