Performance Tool W9049 Magnetic Hex Nut Driver Master Kit, Cr-V Steel 1/4-Inch-Inch Quick-Change Hex Shank SAE & Metric-Inch, 21pc socket, bit & nut driver set

MAGNETIC NUT DRIVERS: 12 magnetic nut drivers made of durable CrV steel with 1/4-inch detent hex shanks that securely lock into any standard drill chuck, screw gun or quick change fitting., SAE & METRIC SIZES: Includes a range of SAE sizes: 3/16, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16-Inch and Metric sizes: 5, 5.5, 6, 7, 8, 10, 12mm for versatile use., SQUARE DRIVE SOCKET ADAPTERS: 3 square drive socket adapters that transform any drill or 1/4-Inch hex impact driver into a power nut driver for 1/4, 3/8 and 1/2-Inch sockets., FLEX EXTENSION BAR: 6-Inch x 1/4-Inch hex head flex extension bar with a swivel collar and magnetic tip for secure holding of bits and fasteners., CONVENIENT STORAGE: All the bits fit in a 2-sided flip case with crystal clear lids for easy bit identification. The case also has a peg hook hanger tab that can be pulled out for hanging or pushed flush for compact storage.