These lightweight anodized aluminum bench dogs measure ¾” in diameter and 2-3/8” long. The spring tensioner ensures these dogs stay put no matter what height you set them to. The 5/8” tall clamping face is cross-hatched and has a negative slope ensuring a firm grip on your workpiece without the tendency to lift. This two-piece set is ideal for use in benches with ¾” or thicker tops and work in ¾” diameter round dog holes.