Proprietary steel and heat treat process for maximum strength and durability. Thin wall construction for easy access in tight spaces. 6-point deep wells for unyielding bit engagement. Includes 1/2 In. (inch) and 9/16 In. Shockwave impact sockets and 1/2 In. socket adapter. No. 49-66-4485: Pkg Qty: 3, Package Type: Card