Description: Bicycle headset bottom bracket is perfect tool for helping you to replace your bike old torn part, easy to use, convenient to install. Quick release design and standard construction for fast installation and removal of tool. For the first time, it is recommended to press into a bowl first,and then press into another bowl after completion,it is recommended to apply grease to the pressing part for easy installation,disassembly and maintenance Compatible external semi hidden headsets and BB86-92 press fit bottom brackets. Ball Bearing Design makes it more stable while using and would not hurt your bike frames. Specification: Material: Aluminum Alloy Stainless steel Color: Blue Silver Size: Screw length diameter 24x1cm/9.45x0.39inch Aluminum alloy compact diameter and height 5.5x1.7cm/2.17x0.67inch Package Includes: 1 Piece Screw Bar 2 Pieces Aluminum Alloy Briquetting 1 Set Flat Thrust Ball Bearings 2 Pieces Protective Gasket 2 Pieces Stainless Steel Nut Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!