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. Compatible with SRAM® DUB cranks and Shimano® GRX / Decore XT / SLX cranks and FSA Hollow cranks etc. NANO 7 Precise CNC machined tool surfaces provides smooth operation RING-PULL KNOB Makes storage and removal simple CHAIN REPAIR Compatible with SRAM® DUB cranks and Shimano® GRX / Decore XT / SLX cranks and FSA Hollow cranks etc. LIMITATION Hollow BB spindle with minimum 124mm straight sectionID range ø19 - ø25mmOpen end ID range ø19 - ø25mm TOOLS 7 function full metal folding toolAllen wrenches - 2 / 3 / 4 / 5 / 8mm T25 Torx® wrenchflat head screw driverAluminum 13 speed chain tool*with steel wire chain hook MATERIAL Chrome vanadium steel / Aluminum body / Engineering grade polymer MOUNT Bottom bracket spindle LIMITATIONS Hollow BB spindle with minimum 124mm straight section ID range ø19 - ø25mmOpen end ID range ø19 - ø25mm SIZE 13 x 2.5 x 2.5 cm / 5.1" x 1" x 1" WEIGHT 82 g / 2.89 oz ADDED FEATURE Dust caps included