These black anodized 7075 T6 aluminum alloy outserts have been tested and designed by experienced hunters and target archers to ensure maximum penetration and performance. This outsert fully encompasses the base of the shaft just over 1 inch providing OUTSTANDING arrow strength and concentricity. With Micro-Glue channels inside the outsert to create a much better bonding surface this outsert is built to last shot after shot. If you are looking for maximum penetration and shot after shot performance then the deadly combination of the Deep Impact or X-Impact shafts and this outsert are sure to be a hit!