Astro 7826 Double Flaring Tool Kit Includes 5 adapters: 3/16, 1/4, 5/16, 3/8 and 1/2 (4.8mm - 12.7mm) Chrome swivel is made of alloy steel to reduce friction. Forged yoke is made of heat treated steel. Blow molded case for storage. Weight 3.5 lbs.