Strengthens connection of the mag extension to barrel.  Includes sling swivel stud which is reversible for right or left-handed shooters.  May also be used to mount 1" diameter flashlights or lasers to barrel.  Manufactured in the USA of black DuPont extreme temperature glass reinforced polymer.  Easy installation. Limited lifetime warranty.

Fits all 12 gauge shotguns.

Works on any 12 gauge smooth barrel guns.

The smaller hole fits the barrel, the large hole fits Mag extension, sling swivel stud goes through middle with nut on opposite outside.