The 1 1/4" quick release swivels are made of steel with a phosphate finish. These swivels are the correct size and finish for all AR-15 type rifles. These swivels are designed for use with 1 1/4" slings and are specially made for those who want correct size and finish swivels on AR-15 rifles. For use with our front and rear swivel mounts and they also attache to any standard swivel mount stud.