1、The screw structure is compact, easy for you to install, and can be used repeatedly 2、The product support seamless nail, which will not damage the wall, very practical and convenient 3、Hanging sawtooth hooks are easy to install, and the hardware is fixed with screws, helps a lot 4、Excellent carbon steel material with high hardness and good wear resistance, strong and durable 5、Suitable for canvas, scutcheon, photo frame, photo, drawing board, painting, painting exhibition, fashion wall clock, digital title, wooden crafts, wooden pallet project, cross stitch, etc. 100 x Sawtooth Picture Hangers200 x Screw Item Type: Sawtooth Picture HangersMaterial: Carbon steelPurpose: Suitable for canvas, scutcheon, photo frame, photo, drawing board, painting, painting exhibition, fashion wall clock, digital title, wooden crafts, wooden pallet project, cross stitch, etc. Screw Size: Approx. 3 x 10mm / 0.1 x 0.4in