Features: 1. Brand new and high quality 2. Made of high quality material, and practical to use 3. Lightweight design The crank cover has been repeatedly designed to be strong and lightweight. 4. The tooth shape of the tool matches the tooth shape of standard hexagonal screws. Repeated disassembly and assembly will not easily scratch the teeth and will not damage the screws and accessories. Specifications: *Product Name: Bicycle Crank Screw *Material: Nylon *Size: 18mm *Color: Black (As Pictures Show) *Weight: About 9.3g Package Content: 1 x Bike Crank Screw 1 x Wrench Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Compatibility - Bike Crankarm Bolt 18mm for Shimano HollowTech With Tool Bicycle Crank Screw Good Performance Materials - These bike accessories are made of premium material, ensuring their durability and long-lasting performance. Optimal Performance - These accessories offer versatility and adaptability to different cycling needs and provide optimal performance and reliable functionality enhance the riding experience and ensure safety. Easy Installation - These accessories can be easily installed on your bike to get your bike running again. After-sale Serive - We provide high quality products, if there is any problem with our product, please contact us.