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 #12-14 thread size and range from 3/4" to 3" in length. Full assortments of #46160 contain six (6) refills comprised of Hillman item numbers #2663, #2664, #46161, and #408024 - #408026.