Brand Name: Milwaukee *Sub Brand: SHOCKWAVE IMPACT DUTY *Drive Size: 1/4 - 5/16 - 3/8 - 7/16 inch drive in. *Length: 1.875 in. *Shank Diameter: 1/4 in. *Product Type: Nut Driver Set *Material: Heat-Treated Steel *Shank Type: Hex Shank *Number in Package: 4 pc. *Packaging Type: Carded *Usage: Securing fasteners in tight spaces *Impact Rated: Yes *Broadly targeting cordless users, the Shockwave Impact Duty accessory line is not only ideal for heavy duty impact applications, but delivers a full system solution for all the user's drilling and fastening needs.