Description: Made of carbon steel material and galvanized surface, anti-rust. 12 splines that are approximately 22mm across. Compatible with most cassettes. Can be used to tighten and remove screw-on freewheels. Used in conjunction with a Chain Whip/Freewheel Turner to remove cassettes from quick release hubs. Specification: Material: carbon steel Bottom Diameter: 25mm/0.98 Height: approx. 56mm/2.2inch Guide Pin Diameter: approx. 5mm Package Includes: 1 Piece Cassette Lockring Removal Tool Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid