Designed for use with impact drivers, the Shockwave Impact Duty accessory line is ideal for heavy-duty impact applications and delivers a full system solution for all user's drilling and fastening needs. The combination of the Shock Zone design and special heat treatment absorbs impacts and allows the bit to flex with spring-like action. Features include a laser-hardened Wear Guard Tip for improved wear resistance and protection of the fit over the life of the bit. The Shock Zone Geometry is designed to flex, reducing stress at the tip and resulting in fewer tip breakages. Made from custom-engineered steel for longevity. Typical applications include industrial and construction. This is a 3-piece Impact socket adaptor set. Each adaptor is made from proprietary steel and undergoes a heat-treat process for maximum strength and durability. Each adaptor has heavy-duty construction for fastening capabilities in all impacts. Contains: 1 x 1/4" Hex - 1/4" Square, 1 x 1/4" Hex - 3/8" Square, 1 x 1/4" Hex - 1/2" Square.