An assortment of hex washer-head self-drilling screws from The Hillman Group. Self-drilling screws possess a drill point enabling it to easily drill into material such as thin-gauge steel, wood, and fiberglass. No pilot holes required. Variants included in this assortment feature a coarse #10-16 thread size and range from 1/2" to 3" in length. Full assortments of #46157 contain eight (8) refills comprised of Hillman item numbers #2660 - #2662, #46158, #408021 - #408023, and #408043.