[Material Design] Made of and practical material, long-term usability. [Bike Crankset End Cap Bolt Extractor Tool] Specifically designed for the installation and removal of chainring crank screws and M27 self-extracting screw covers on bicycles. [ Construction] Crafted from 45# high carbon steel, heat-treated, and CNC finished for superior hardness, and safety. The for edges are chamfered and rounded to prevent hand injury. [Convenient Specifications] Weighing approximately 72g, it is lightweight and easy to carry. [Package Inclusion] Comes with 1 Bicycle Crank Wrench, providing a comprehensive tool solution for cyclists. Description:*Made of material, and practical to use*Bike Crankset End Cap Bolt Extractor Tool for FSA Bicycle Crank Wrench*Suitable for FSA chainring crank screw installation and removal, M27 self-extracting screw cover installation and removal.*Function: Made of 45# high carbon steel, quenched and hardened by heat treatment, high hardness, CNC finishing, high for precision, edge chamfering, rounded and not hurting your hands. Specification:*Material: 45# Steel*Color: Silver (As Pictures Show)*Weight: About 72g Package Includes:1 x Bicycle Crank Wrench