Compact and portable chain tool with 7 function full metal folding tool that slides into your MTB bottom bracket for easy access The built-in magnets secure and hold the folding tool in place. For those who like to ride without a bag or pack, this stealthy multi-tool is a great choice. - Allen wrenches - 2, 3, 4, 5, and 8mm T25 Torx wrench flat head screw driver - Aluminum 13 speed chain tool with steel wire chain hook - Compatible with SRAM DUB cranks and, Shimano GRX / Decore XT / SLX cranks, and FSA Hollow cranks etc. - Material: chrome vanadium steel / aluminum (body) / engineering grade polymer - Limitations: hollow BB spindle with minimum 124mm straight section ID range 19 - 25mm, open end ID range 19 - 25mm - Weight: 82 g / 2.89 oz - Dust caps included