The improved Standard includes high carbon steel, is spot-welded, copper brazed and heat treated with a triple laminated tip. Combined with the ACE Interlocking Ferrule, these characteristics create a nearly indestructible head of the highest quality. We have tested these heads for durability by shooting them into concrete with absolutely no damage to the heads. These heads combine excellent flight characteristics, great penetration, and unequaled toughness. Per 6 pack. 160 grain 1-3/16" X 2-7/16"