Size - 33mm x 21mm/1.29x0.82Inch(L x W); Hole Diameter:2.4mm/0.09Inch; Material: Iron; Shape: Bow-Shaped; Color: Black; 200Pcs x Picture Frame Backing Clips (With 200Pcs Screws). Material - The picture frame hardware backing clips are made of iron, sturdy and , with treatment to prevent rusting. They can be used for a long time. Feature - Our photo frame turn button fasteners are very easy to install. First, place the turn buttons on the backboard of the frame, align the screws with the holes of the turn buttons, then tighten the screws to secure the frame by pressing against the backboard. The fasteners are sturdy and , coated with oil to prevent rusting. They are finely crafted, reliable, and easy to use. We also provide 200 pieces of screws, so there is no need to worry about running out of screws. Application - The Picture Frame Backing Hardware Clips are versatile and can be used for purposes, such as hanging photo frames, pictures, digital paintings, artwork, posters, decorative pieces, and other wall hangings. They can also be used to create art pieces by using these small items creatively. Note - When using Picture Hardware Backing Clips, avoid over-tightening to prevent damage, and the product stays in good condition through regular cleaning and keeping dry. Colour:Black Material:iron Package Contents: 200 * Picture Frame Clip 200 * screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.