Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and Amazon Prime.If you're a seller, Fulfillment by Amazon can help you grow your business. Learn more about the program. General-purpose selection of the most frequently used nut drivers Tip-Ident quickly identifies nut driver hex orientation and size by color coding the handle ends so you can easily engage the nut driver with the fastener Cushion Grip handles allow for greater torque and comfort Klein Tools 631 NutDrivers, 7 Piece Nut Driver Set, Hex Nut Sizes 3/16, 1/4, 5/16, 11/32, 3/8, 7/16 and 1/2-Inch on 3-Inch Full Hollow Shaft Since 1857, the company operated by Mathias Klein and his descendants to the fifth generation, has grown and developed along with the telecommunications and electrical industries where Klein pliers first found major usages. Today, Klein Tools, Inc. represents much more than Klein pliers. The company's product line has broadened to include virtually every major type of hand tool used in construction, electronics, mining, and general industry in addition to the electrical and telecommunications fields. Klein offers a lifetime warranty on material defects and workmanship for the normal life of the product. The Klein 631 nut driver set has a cushion grip handle that allows greater torque and comfort while you are working. The chrome plated shafts help prevent corrosion and the internal flanges provide a solid, twist-resistant shaft anchor. Cancer and reproductive harm - See www.P65Warnings.ca.gov for more information.Warranty does not cover misuse of product.