The precision-engineered Seatpost Clamp secures your seatpost and looks good doing it. At the heart of the Wolf Tooth Seatpost Clamp is a custom self-aligning bolt and anchor. The M5 bolt includes spherical washer and mates with a cylindrical anchor barrel. This means that threads are always perfectly aligned, preventing binding and ensuring consistent clamping force.M6 stainless steel bolt with integrated washerTool interface - 4mm hex keyItem SpecificationsColorOrangeDefined ColorOrangeDiameter34.9MaterialAluminumTypeBolt-On Wolf Tooth Seatpost Clamp Seatpost Clamp UPC: 810006800210