The precision-engineered Wolf Tooth Seatpost Clamp secures your seatpost and looks good doing it. At the heart of this seatpost collar are our 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. Machined from 6061 aluminum in our Minneapolis facility, the Wolf Tooth Seatpost Clamp is available in three sizes for the espresso color and six sizes and a variety of other anodized colors.