1.Wide applicability: The total length of the screw rod is about 250mm, which can be suitable for head tube lengths and bottom diameter tube lengths up to 140mm (note: if your bicycle head tube or bicycle bottom bracket tube length is greater than 140mm, this tool is not suitable). The screw rod diameter is about 12mm, and the thread pitch is tight and fine. The screw rod is thick and has high strength, 2. Features: The installation tool for the bicycle bottom bracket bearing adopts high-strength aluminum alloy joints, handles, pressure blocks, stainless steel screws, nuts, CNC turning processing, surface anodizing treatment, upgraded dual plane thrust bearings, easy installation, and does not damage the vehicle body. 3. Material: The main body is made of aluminum alloy material, which is lightweight, sturdy, and durable.