Professional: A set of tools specially designed for installing bicycle and bottom bracket helmets to make your job easy and professional. Pressure block design: Pressure block design, the back side is used to assemble the pressure bottom bracket, and the casting table is designed to avoid crushing the bearing during installation. Easy to use: features a quick release design for quick installation and removal of tools. The bicycle helmet bottom bracket is the perfect tool to help you replace your old torn bicycle part. Use: Bicycle helmet installation tool specially designed for helmet installation bike and crankset, let you work easily and professionally. Reminder: Please use the grease when installing, it could be very helpful for your work and protect your helmet or case bracket. Features: Usage: The tool special designed for bike headset and bottom bracket installation, make you job done easily and professional. Materials: The thread rod is made of harden stainless steel, the press mount and the handles made of aluminum alloy. Size: Length of the thread rod is about 24.5cm/9.65inch, diameter ia sbout 12mm/0.47inch . Easy Install: Bicycle headset bottom bracket is perfect tool for helping you to replace your bike old torn part, easy to use, convenient to install. Ball Bearing Design: Ball bearing design makes it more stable while using and would not hurt your bike frames. Press Block Design: Pressure block design, the reverse side is used to assemble the press-in bottom bracket, and the sinking table is designed to avoid crushing the bearing during installation. Remind: Please use the grease when installing, this could do a lot helpful for your job and protect your headset or bottom bracket. Specifications: Item Type: Bicycle Headset Installation Tool Material: Aluminum Alloy, Stainless Steel Color: Orange+Silver Stainless Steel Thread Rod: Total Length: About 24.5cm/9.65inch, Diameter: About 12mm/ 0.47inch Size: About 27 x 6 x 6cm/10.63 x 2.36 x 2.36inch(L x W x H) Package Includes: 1Pc x Bicycle Headset Installation Tool Transition: 1cm=10mm=0.39inch 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement.