Deep thread design provides strong engagement, locks into many sizes of drywall for maximum holding power. Starts easier than other self-drilling drywall anchors Anchors pre-drills precise hole in types of drywall ,no hole preparation required, made of zinc , easily removed. hanging accessories, artwork, shelving, mirrors, picture frames, shelf straps, decoration fixing, calligraphy, curtain rods and small decorative shelves, and more. Hangs up to 50 lbs for Hanging and Mounting., Weight: 0.440924524 pounds, Manufacturer: Tuidzljd