Carlson's Choke Tubes, Benelli Crio Plus 12 Gauge Flush Mounts are ideal for shooters who require their shot patterns remain tight from different distances. This Shotgun Choke manufactured by Carlson's Choke Tubes is made of 17-4 heat treated stainless steel and is made to used with the Benelli Crio Plus system. The Carlson's Benelli Crio Plus Choke Tubes extend 3/4" outside the barrel eliminating damage to your barrel caused by prolonged steel shot use. Carlson's Choke Tubes is one of the most trusted names in Shot Gun Choke Tubes, their ingenuity and know-how makes the Carlson's Benelli 12 Gauge Crio Plus Flush Mount one of the best Carlson's Shotgun Chokes available.