Fits most Remington 12 ga. Shotguns; Manufactured from 17-4 stainless steel and precision machined; Reduces recoil and at the same time reducing muzzle jump making follow up shots quick and easy; Feature a 25% longer parallel section in the choke which allows for tighter, denser patterns, with less flyers; The extended portion of the choke tube allows for quick and easy removal and insertion; Lead, Copperplated, Nickel, Hevi-shot, Bismuth and tungsten may be shot through these choke tubes; When using steel shot do not shoot steel larger than BB through any choke tighter than full; Blue finish; Carlson's Lifetime Warranty