Classic type Seat Binders.8mm bolts for use on traditional frames with integrated clamps.Fixed side has a "key" to lock into frame notch to prevent spinning whilst tightening, and, additionally features a 5mm Hex broach - in case the key/notch fail to hold the torque.- Cr-Mo steel- 8mm outer diameter- Keyed for frame notch- Double end 5mm Allen key broached- Chrome Plate- Available in 19, 22 or 25mm lengths (minimum internal clamping size)