Item Type: Headset BB Cup Install ToolMaterial: Stainless SteelProduct Color: As Pictures Shown Screw Rod Length: Approx. 20cm / 7.9inBase Plate Diameter: Approx. 5cm / 2.0inProduct Weight: Approx. 265g / 9.3ozProduct Application: Compatible with common 34-56mm / 1.3-2.2in headset, suitable for BB 86-92 press in bottom bracket installation 1Product Application: The install tool is compatible with common 34?56mm / 1.3?2.2in external headset, suitable for BB 86?92 bottom bracket installation. 2Stainless Steel: Made of high quality stainless steel material with fine workmanship, the press tool has high strength, high hardness, and not easy to deform. 3Wear Resistant and Anti Rust: Galvanized bright silver base plate is wear resistant and anti rust, and can be used for a long time. 4Plane Bearing: The plane traction bearing is more labor saving and compresss quickly without wear and tear, will not damage your bike frame. 5Wide Compatibility: Length of the bolt is about 20cm / 7.9in, and the diameter of the base plate is about 5cm / 2.0in, which has a wide compatibility.