What this product does Twopiece locking chainring/sprocket bolts designed for mountain bikes to secure the chainring/crank assembly with stable, reliable performance. Made from 7075 aluminum alloy for strength, low weight, corrosion resistance, and extended service life. Key benefits (why you need it) Stability: Twopiece locking design keeps your chainring securely attached under trail impacts and pedaling loads. Durability: 7075 aluminum alloy resists rust and wears better than standard alloys, reducing the need for frequent replacements. Lightweight upgrade: Reduces weight compared with steel bolts without sacrificing strength, improving ride feel. Style options: Available in three colors to match or your bike. Important specifications Material: 7075 aluminum alloy (super light, durable, and corrosion resistant). Bolt height: approximately 6.5 mm (0.26 inch). Design: twopiece locking bolts for secure fastening. Colors: three color options available. Compatibility and use Intended for mountain bikes and compatible with chainrings/sprockets that use twopiece locking bolts. Fits typical crank/chainring assemblies; verify bolt height (6.5 mm) against your chainring thickness before . Installation and care Easy to install with simple hand tools; no specialized equipment required. Do not apply excessive force when installing aluminum alloy bolts—overtightening can damage the bolts. Check torque and alignment as recommended for your crankset to ensure secure, longlasting fit. Practical use scenarios 1. Replacement: Swap out rusty or worn steel chainring bolts on a mountain bike for corrosionresistant 7075 aluminum bolts to extend component life. 2. Lightweight upgrade: Reduce rotating mass on trail or crosscountry bikes by replacing heavier bolts while maintaining secure twopiece locking performance. 3. Field and personalization: Carry a spare set for quick trail repairs, and choose a color that matches your bike for a clean, finished look. Notes Maintain appropriate torque when tightening to avoid damage. Confirm compatibility with your specific crankset/chainring thickness before installation.