Chrome Vanadium Steel ;

Heat Treated, Sandblasted ;

Precision Milled ;

1/4" Hex Shank fits most power corded or cordless drill ;

Sizes:

7pcs SAE: 3/16", 1/4", 9/32", 5/16",11/32" ,3/8", 7/16" 6 points .

7pcs Metric: 5, 5.5, 6, 7, 8, 10, 12mm 6points.