NEXIFY Quick Release Seat Post Clamp with Bike Chainstay Protector - Aluminum Seatpost Collar for Mountain Biking, Cycling, Track Riding QUICK RELEASE COMPATIBILITY - Clamp it on your standard seatpost for quick and easy adjustments and an ultra-strong hold that never slips or slides. IMPROVED DURABILITY - Made with anodized aluminum alloy, Nexify post clamps are made to last through even the toughest on and off road riding trips. VERSATILE DEPENDABILITY - Precision cut for reliability and lightweight functionality, it works effortlessly with standard bike saddles. SLEEK, SIMPLE, EASY - This bicycle post clamp can be used on a wide variety of bike styles and cranks down solid for reliable security. WORKS WITH FRICTION PASTE - Use Nexify post clamps with friction paste and proper pre-tension and it'll maintain the tightest hold to fit your frame.