Quickly and accurately install bottom bracket bearings into press fittype bottom bracket shells \n Quick release design for fast tool installation and removal \n 12 precisionmachined bushings in 7 sizes \n Works on bottom bracket shell widths from 68mm to 150mm \n Bottom bracket bearing extractor add on set available as PK5535. The BBPAOS is used in conjunction with the BBP1.2 Bottom Bracket Bearing Press Kit to extract press fit bottom bracket bearings, cups and adapters. The BBPAOS utilizes an expanding collet and extractor cup system to safely remove bearings without requiring impact. Also included are eight installation drifts for pressing bearings into preinstalled cups.