The Wall Twister® is an all steel, single piece screw anchor manufactured with a unique deep cutting thread design, its suitable for fastening objects into drywall, wood, concrete, plaster, brick, and block walls. The patented reverse serrations under the head prevent over-torquing. When working with masonry-based materials, use the 3/16 carbide tipped drill bit included in the kit to create a pilot hole. When fastening into drywall or wood, no pre-drilling is required. Typical applications include HVAC fixtures, signs, telecommunications equipment, plumbing fixtures, and many more.