Material Stainless steel Number of pieces 4 About this item High quality material: the bike repair tools are made of premium alloy steel, extremely strong, durable and weather resistant. Laptop Ultralight Laptop Tools - Lightweight and small in size, bike repair tools allow you to store them in your pocket or bag, super easy to carry, also perfectly suitable for 8/9/10 bike chains all common bicycle chains. Durable Shaft Removal Sleeve Sleeve - Equipped with 1-axis dismounting sleeve with inner diameter of 0.9''/2.4cm, perfectly suitable for dismounting the 20-tooth square shaft. Value Set - With the premium quality crank puller and flywheel dismantling sleeve, it perfectly meets your various repair needs; The bicycle crank puller is ideal for a square hole crank, and the flywheel disassembly sleeve has an inner diameter of 0.7''/1.9cm. Wide Application- Perfectly suitable for the repair of mountain bikes, road bikes and most bicycles, very convenient and practical.