Nut driver set of 2 pieces with magnetic tip and hallow shaft. Overall length: 3-1/2'' (89 mm), shank length: 1-1/2'' (38 mm) and hex size: 1/4'' 5/16. Weight (lbs.): .20. Color code: red and yellow. Stubby nut drivers allow for work in close quarters. Exclusive hollow shaft design with Rare Earth magnetic tip features unobstructed pass-through, even on long bolts. Includes two nut drivers (Cat. No. 610-1/4M and 610-5/16M). Handles are color coded for easy identification. Internal flanges provide solid, twist-resistant shaft anchor. Cushion-Grip handles allow for greater torque and comfort.