An assortment of stainless steel hex washer-head self-drilling screws from The Hillman Group. Self-drilling screws are sheet metal screws with a drill point on the end, allowing them to be used in thin gauge metal without drilling a pilot hole first. The washers under the head feature a neoprene rubber bonding to make secure, water-tight seals. Variants included in this assortment come in #10-16 and #12-14 coarse thread sizes and range from 3/4" to 1-1/2" in length. Full assortments of #46121 contain six (6) refills comprised of Hillman item numbers #408210 - #408215.