Cyclists, here's some essential hardware for keeping your cranks securely attached! These ONIPAX bike crank arm bolts are exactly what you need for proper bike maintenance and repair. Measuring 8mm x 15mm with a hex head design, they fit most standard crank arms perfectly. The pack of 12 is super convenient - you'll have plenty of spares for future use or for working on multiple bikes. Made with high-strength materials and manufactured in Taiwan, these bolts are built to withstand the demands of regular cycling without stripping or loosening. Installation is straightforward with a standard hex wrench, making them perfect for both professional mechanics and DIY bike enthusiasts. One of the key benefits is how they help protect your bottom bracket from water, dust, and debris - proper sealing means longer life for your valuable components. Whether you're doing routine maintenance, rebuilding an older bike, or just want reliable replacement hardware, these bolts deliver the durability and performance you need. Don't risk your cranks coming loose during a ride - quality bolts like these provide peace of mind and secure performance mile after mile. Keep your bike in top condition with these affordable, reliable crank arm bolts that won't let you down when you need them most. Your bike (and your safety) will thank you for using proper hardware!