Gobblin' Thunder chokes are precision machined to high tolerance standards on computer controlled equipment. Made of 17-4 ph grade stainless steel in order to produce the best quality shotgun chokes on the market today. They feature a unique conical/parallel internal design and our exclusive outward angled diagonal ports. These features improve pattern density by up to 20%. The extended ported section also makes follow up shots faster and more accurate by reducing recoil and muzzle jump.