Highlights:Size : 3/32 x 3/8Countersink setMade in the USACombination countersink, drill pilot, countersink or counterbore in one step82 degree counter sink angle sets screw head tight and flush to surface1/4 standard hex shank; uses straight shank drillLarge 1/4 hardened set screw allows user to easily adjust depth of screw hole; hardened to RC 62Drill bits are adjustable for different length screws