Milwaukee 48-22-2404 Hollow Shaft SAE Hex Shank Compact Nut Driver Set (4 Pieces) INCLUDES: 1 x 9/16, 1 x 7/16, 1 x 5/16, 1 x 1/4" Nut Driver (3 Shaft on Each) CHROME PLATING prevents rusting from long term storage and gives these drivers an extra layer of defense on tough jobsites HEX SHAFT allows you to apply additional torque to these drivers with a wrench for stripped or extra tight bolts DEEP WELL SOCKETS allows for greater activation with longer bolts RUBBER OVERMOLD on the grip allows for easier handling, providing you with more torque potential in slippery conditions