Aluminum and steel bushings are designed to fit a variety of barrel sizes without causing damage, with special bushings available for M1A/M14 and M1 Garand barrels.
Steel bushings offer durability and the clamping power needed to loosen tight barrels, while aluminum bushings provide strong holding power and prevent barrel marring.
Bushings are 3 inches long, 1¾ inches in diameter, and come in both split and solid configurations for customization by professional gunsmiths.