Klein Tools 65213Hex Knurled Hex Bit Sae Socket Set, 1/4, 3/8 And, Piece The Klein Tools 13-Piece Knurled Hex Bit Socket Set features 1/4, 3/8, and 1/2-Inch drive SAE hex bit sockets are optimized for driving applications. Knurling at base of socket allows for greater grip when starting fasteners by hand. Set contains the most common hex bit sizes. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857. 13-PIECE SOCKET SET: Includes SAE sizes 5/64, 3/32, 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 3/8, 7/16, 1/2 and 9/16-Inch SAE HEX BIT SOCKETS: 1/4, 3/8 and 1/2-Inch drive sizes are ideal for various driving tasks KNURLING ON SOCKET BASE: Enhances grip for easier hand-starting of fasteners EASILY OPEN AND CLOSE: Spring-loaded latch on case allows for one handed use EASY SIZE IDENTIFICATION: Bold stamped size markings are easy to read and use CLEAR LID ON CASE: Allows quick tool identification and includes a built-in small parts storage tray MODULAR STORAGE SYSTEM: Case easily connects with other MODbox components, allowing you to create a customized mobile workstation tailored to your needs