7-piece magnetic tip nut driver set with 6 inch hollow shafts. Full hollow shafts (except 3/16 inch [5 mm]) facilitate work on long bolt applications. Rare Earth magnetic tips. Cushion-Grip handles for greater torque and comfort. Color coded handles domes for easy identification. Internal flanges provide solid, twist-resistant shaft anchor. Chrome plated shafts help prevent corrosion. Set contains Cat. No. 646-3/16M, 646-1/4M, 646-5/16M, 646-11/32M, 646-3/8M, 646-7/16M, 646-1/2M.