Feature: 1. The flywheel and hub is locked by the flywheel cover. 2. The cassette flywheel disassembly socket can be split into several pieces, the speed can have 7/8/9/10/11/12 speed. 3. The key teeth of the cassette flywheel sleeve are shorter and the key teeth are thicker. 4. The key teeth of the rotating flywheel sleeve can not be separated, its key teeth are longer and more thin. The whole is locked to the flywheel by the bottom thread. 5. Made of premium steel material, sturdy and durable. 6. Great bicycle flywheel tool for you. Specification: Condition: 100% Brand New Item Type: Flywheel Disassembly Socket Material: SteelColor: silver Option: for cassette flywheel, for rotating flywheel For cassette flywheel size: approx. 4x2.5cm/1.57x0.98inch For rotating flywheel size: approx. 4.5x2cm/1.77x0.79inchSpecificatios: For cassette flywheel: For 7-12 speed cassette flywheel disassembly For rotating flywheel: For 6-10 speed rotary flywheel disassembly Package List: 2 x Flywheel Disassembly Socket