Double-sided socket tool for installing and removing both 48.5mm and 44mm 16-notch bottom bracket cups 48.5mm, 16-notch pattern matches up with Wheels Mfg bottom brackets, along with some FSA MegaEVO bottom brackets The 44mm, 16-notch side matches up with Wheels Mfg bottom brackets, along with many other outboard bearing bottom brackets including Shimano, FSA MegaEXO, Campagnolo Ultra Torque and SRAM/Truvativ Socket is machined for 1/2` drive, but a 3/8` to 1/2` adapter is included to be compatible with 3/8` drive torque wrenches Compatible with all Wheels Manufacturing bottom brackets and others Bottom Bracket Socket Red 48.5/44mm 16-notch BBTOOL-48-44 1/2` or 3/8`UPC/EAN/GTIN: 811079024558