• Black safety washer for bicycle front/rear wheel, contains two sizes(M8 & M10) to meet all needs
• Made of high-hardness steel and heat-treated
• Securely lock the bicycle wheel to ensure safety
• Cool black safety washer can be used for accessory replacement or DIY modification
• Package includes: 2 Pcs M8 and 2 Pcs M10 black high-hardness safety washer