1、T6 Heat Treatment: Aluminum alloy 6061 undergoes T6 heat treatment to make the strength higher, and the hardness of the inner accurate tooth form is higher than that of ordinary ones. 2、High Quality Material: The bicycle multi function BB wrench is made of high quality aluminum alloy, which is strong and durable and has a long service life. 3、TL‑FC32: Applicable specifications are suitable for Shimano BB51, for Shimano BB5700, for Shimano BB70, for Shimano BB80; for Hope; for SRAM, for Truvativ GXP; for Race face X‑type; for PRWHEEL. and other BSA BB, and 16 card slot locking ring can be used. 4、TL‑FC24: Applicable specification for shimano XTR, for DURA‑ACEBAS BB. The bottom bracket removal tool is long enough to provide enough leverage to install and remove the BB with your sufficient strength. 5、TL‑FC25: Applicable specification for shimano SLX, for shimano XT, for shimano 105, for ULTEGRABAS BB. The red wheels at both ends can be used to remove the plastic cover at the bottom of the crank arm on the non drive side.