This auto-adjust push peg clamp features patented auto-adjust technology mounted fitted with a split peg that inserts and can tighten into a 3/4 inch or 20 mm round role. It rotates 360 degrees, allowing for a wide range of clamping applications. It eliminates the need for constant readjustment and enables the clamp to maintain clamping pressure regardless of material thickness. The hardened steel push rod applies consistent pressure over a range of material thicknesses up to 3 1/2 inches. Use with Craftsman peg fences to brace material.