SK 360 6 Piece 12 Point 3/8-Inch to 1-Inch Box End Wrench Set Six fractional box-end wrenches made in the United States Patented SuperKrome finish for durability and maximum corrosion resistance SureGrip hex design drives the side of the fastener, not the corner Box ends are offset for better hand clearance Wrenches measure 3/8-by-7/16-inch, 1/2-by-9/16-inch, 9/16-by-5/8-inch, 11/16-by-3/4-inch, 13/16-by-7/8-inch, and 15/16-by-1-inch