The socket is designed for use with an impact driver including Klein's Impact Wrench (Cat.Nos.BAT20CW, BAT20CW1). Drive end diameter: 1-1/8, working end diameter: 1-1/8 The snap-on jh Williams BB-526 51/64-Inch 5 point Penta socket has an overall length 1-1/16-inches, has a black industrial finish, and a 3/8-Inch drive. This 5-point penta socket features a 3/8" drive, an SAE scale, and an impact finish. Order the Williams BB-526 penta socket online for your work space today BB-526 Penta-Socket 3/8-inch Drive Replacement for Williams, 51/64 5-Point Utility Impact Socket : Tools & Home Improvement Return Policy: Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in... Purchase Williams penta sockets online today. Drive size: 3/8, overall length: 1-1/16 14MM STD 6PT SKT 3/8 DRIVE SOCKET WILLIAMS Black Penta Socket. 3/8" D: 3/8 In Drive Size, 51/64