The SHOCKWAVE Impact Duty Nut Driver Set is perfect for heavy-duty impact applications as well as handling all your drilling and fastening needs. Crafted from custom-engineered steel and finished with a special heat treatment, this set delivers maximum strength as well as extreme durability. The strong magnetic tip ensures a secure grip, while the 1/4in. Hex reception is ideal for high-torque and impact applications. Colour-coded rings on the nut drivers allow for quick size identification. Features and Benefits Perfect for high-impact and high-torque applications Strong magnetic tip holds fasteners firmly for better precision Custom-engineered steel and heat treatment ensure maximum strength and longevity Colour-coded nut drivers allow for quick and easy sizing Contents 7mm, 8mm, 10mm, 13mm