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14 pc Power Nut Driver Set SAE and Metric 1/4" Hex Sizes: 3/16" to 7/16" and 5 mm to 12 mm
Product Description-
7pc Power Nut Driver Bits Sizes: 3/16", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16"
7pc Power Nut Driver Bits Sizes: 5, 5.5, 6, 7, 8, 10, 12mm
Ultra-durable Chrome-vanadium steel construction for longer use,anti-rounding&corrosion resistance
Hex-shank design allows you to quickly change sizes, provide sure grip in any chuck
Part# 75914SD 
