Cutting spurs on the edge of the bit score the outer edge of the hole before the cutting edge removes the material; Set includes 1/4", 3/8", 1/2", 9/16", 5/8", 11/16", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8" and 1-1/2" drill bits; Folding nylon storage...
