Description: Made of 6061 aluminum alloy high precision CNC, high precision and reusable. The cogging depth is 10.5mm, has a large contact area with the central axis, a high degree of fit and does not slip. With powerful strength, the locking force of the bottom shaft is 45--80NM. Recommended to be used with a 1/2 ratchet wrench, has a strong locking force and a stable force. Quick release design and industry standard construction for fast installation and removal of tool. Simple easy to use and effective for headsets and press fit BB without any problem. Mechanic press tool works very well for press-in bottom brackets and head cup installations. A must tool set for DIY club, bike workshops, bicycle stores/ clubs or advanced home bike mechanic. Specification: Material: Aluminum alloy Cogging Depth: 10.5mm/0.41inch Size Chart: DUB: suitable for removing 12 and 24 teeth DUB bottom shaft BB39-16: 16-tooth center shaft. for SHIMANO BB9000 BB9100 XTR DA screw-in BB93 center shaft suitable for installation and removal of the center shaft outer diameter 39 mm BB40.5-16: Suitable for installation and removal of 16-tooth dia. 40.5 mm outer shaft. for SHIMANO MT800 BBR60 XT / M7000 UT105 kit bottom shaft BB44-16: Suitable for installation and removal of 16T bottom bracket with 44mm outer diameter. for Shimano BB51 BB52 BB70 BB71 RS500 MT500 bottom bracket and GXP bottom bracket PROWHEEL bottom bracket XIF series bottom bracket and most outer diameter 44 mm 16 tooth bottom bracket Package Includes: 1 Piece Bicycle Shaft Sleeve (Not include wrench) Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.