Size: 10*10cm Chain Key Size: 28.8*3.1*0.5cmQuantity: 2 piecesColour: silver/blackProduct description: Electric tool, fixing tool when disassembling the flywheelProduct name Bike flywheel disassembly sleeve Purpose For removing the flywheel from the hub (axle) Suitable for bicycle flywheel rotary flywheel, cassette flywheel (6, 7, 8, 9, 10, 11 speed flywheel) Material High carbon tool steel (C:> 0.6%) + heat treatment rating A practical entry-level professional bicycle tool, which meets the basic functions and is inexpensive.The overall hardness, keyway precision have been greatly improved, and they are more durable. The key has an enlarged bite area, which makes it easier to use and safer. When using this socket to disassemble the steering wheel, it is recommended to use it with an adjustable wrench. The adjustable wrench is clamped flexibly, the lever arm is longer, and the overall operation is better. Of course, the dismantling of the flywheel must be done without the cooperation of the chain wrench. When using it, make sure the keyway fully engages the keyway of the main flywheel before you begin to exert force to avoid injury.