Material: special tool steel, hardened and tempered surface finish: chrome plated in accordance with EN12540 ergonomic, durable two-component handle Code 622881 is valid for freewheels with 13 and 14 teeth. How to use the device: The cassette locking tool can be used on all types of sprockets. It's a perfect replacement for the traditional whip. It works with 11-, 12-, and 13-tooth cassettes. Code 622881 fits 13- and 14-tooth cassettes.