The double-headed anchorless screws make them ideal for hanging frames on drywall, lath, plaster, or in wood studs. The set includes six gold hanging screws that are 1" long, with a smaller neck that fits most keyhole hangers or cutouts. What's more, these hangers require no pilot hole, as their sharp self-drilling tip easily installs with a Phillips screwdriver. And, because they are professional picture hangers used by museums and art galleries, you can trust their quality and durability. The 4-in-1 design of the screws allows them to be used with D-Rings, Sawtooth, Wire and Keyholes, making them compatible with a wide range of frames and artwork. Details: Gold 1" (2.5 cm) Holds up to 30 lb. (13.6 kg) in drywall and 100 lb. (45 kg) in wall stud 6 pieces Small neck fits most keyhole cutouts, D rings, and sawtooth hangers Carbon steel Instructions: Install with a Phillips screwdriver. No pilot hole needed.