Great for general repair around the house , Zinc Plated 12 x 1" HWH 316 STAINLESS SELF-DRILLING SCREWS 1M Drill the hole to specified embedment depth, plus 1/4 for pin extension, and blow hole clean using compressed air. Alternatively, drill the hole deep enough to accommodate embedment depth and dust from drilling. Screw Masonary 1/4x1 3/4in Hex Country of Origin: Taiwan, Province Of China Pin and head configuration is designed to make anchor tamper-resistant. Enclosed Trailer Screws HILLMAN FASTENER 70334 1/4X1 HWH SHT MTL Screw, Zinc White Screws For Wood Product Description These sheet metal screws, or tapping screws, are highly versatile and are used to attached metal, wood, fiberglass and plastic. 14 Hwh with Bonded EPDM Washer, Zinc #3 Point Self Drilling / Tek... The sharp threads draw material together and ensure a secure hold.