Klein Tools 32557 Multi-Bit Screwdriver/Nut Driver, Heavy Duty Superior torque for tough applications Interchangeable shaft holds 6 universal tips; converts to 3 nut driver sizes and 1 hex driver Nut drivers are heat-treated for added strength and improved torque Cushion-Grip handle provides superior comfort Contains: 3/16-Inch (5 mm) and 1/4-Inch (6 mm) slotted, #1 and #2 Phillips, 1/4-Inch (6 mm), 5/16-Inch (8 mm), and 3/8-Inch (10 mm) nut drivers, #1 and #2 square-recess, 3/8-Inch hex driver