4×4″ square of 3/8″ thick waterjet cut AR500, for the most durable target possible from edge to edge. Cutting via laser or plasma leaves a soft edge on the metal because of the extreme heat involved. Two square hole for mounting via a carriage bolt, and fits perfectly on both our T-Post and Enhanced T-Post Mounts. Can be mounted as either a square or a diamond. Orders of up to 70lbs ship with a single flat rate price. ALWAYS keep in mind impact velocity and energy prevent target damage. Keep your impact energy around 2500 ft-lbs for 3/8″ thick AR500, and 2750fps or under to prevent pitting of the target. If shooting with pistols under 100 yards, we recommend shooting the side without etching to prevent the slim possibility of a ricochet. We use only mill-certified AR500 for our targets!