Easy to use, can be applied using 5mm hex/Allen key, 5mm hex driver bit in a power tool. Self drilling type 17 point can pierce light gauge steel up to 0.6mm. Ribbed bugle heads self embed and can be driven flush or countersunk below the timber surface and are used where finish is a primary concern. Zinc gold plating for indoor corrosion resistance. APPLICATION: For structural framing, furniture, work benches END USER: Builders, Framers, Carpenters, Furniture Makers and DIYers FEATURES: Cold forged and roll formed, bugle head with nibs, coarse thread with type 17 point, made from hardened wire and passivated electroplated zinc finish