Nut driver set of 2 pieces with magnetic tip and hollow shanks. Overall length 9-3/4'' (248 mm), shank length 6'' (38 mm) and hex size 1/4'' 5/16. Weight (lbs.): .50. Color code: red and yellow. General purpose selection of the most frequently used nut drivers. Includes two nut drivers (Cat. No. 646-1/4M and 646-5/16M). Hollow shaft design with Rare Earth magnetic tip felicitates work on bolt applications. Handle end is color-coded for easy identification. Internal flanges provide solid, twist-resistant shank anchor. Cushion-Grip handle allows for greater torque and comfort.