An all steel, tension-free, one piece, threaded fastener. Use to fasten various fixtures directly to drywall, wood, concrete, sand-lime stone or brickwork- No plug needed- No pre-drilling in wood, gypsum board or drywall- Suitable for light to medium duty anchoring- The all metal, one piece steel fasteners have a corkscrew shaped thread that bites into the base material to give a solid hold.