Pure Gold Sporting Clays chokes were designed to give a nice dense pattern with fewer holes in the pattern where birds can be missed. Chokes are ported away from the shooter so there will be no powder residue blasting back. The porting is designed to strip the wad from the shot column, it will also keep the muzzle jump down to gain quicker response on the following shots. All Pure Gold Chokes are made from a top grade American made 17-4 heat treated stainless steel for maximum strength and durability.