Features: The plastic material anchors are very durable and not easy to be broken. The drywall self-drilling screws kit is made of metal, which features high strength and offers good corrosion resistance in harsh environments such as high temperature, cold weather, and high humidity areas. The split in the ribbed anchors expands on two opposing sides as you tighten the screw, increasing holding power. The anti-rotation structure design of the expansion sleeve ensures that tightening the screw will not cause rotation during drilling. These drywall anchors and screws are perfect for hanging a wall shelf in fairly soft drywall. The plastic drywall anchors prevent the anchor from turning in the hole during installation. Scope of Application: Suitable for gypsum board, fiberboard, hollow board, etc., for curtains, lamps, cross stitches, frames, ornaments, decorative pieces, and more. Specifications: - Item Type: Drywall Anchor Kit - Material: Plastic, Metal - Color: Grey, White - Types: - A (Grey Butterfly Shape Anchor) - B (White Aircraft Shape Anchor) - Quantity: 50 pcs Plastic Anchor + 50 pcs Screws (Total 100 pcs) - Size: - A (Grey Butterfly Shape Anchor): 36 x 20 x 15mm, Cap Outer Diameter: About 13mm, Opening Hole: About 8-10mm, Suitable Board Thickness: About 8-15mm - B (White Aircraft Shape Anchor): 30 x 20.5mm, Cap Outer Diameter: About 50mm, Opening Hole: About 8-9mm, Suitable Board Thickness: About 8-15mm Package Includes: 1 Set x Drywall Anchors (50 pcs Anchor + 50 pcs Screws) Notes: - Transition: 1cm = 10mm = 0.39inch - Due to the different monitor and light effect, the actual color of the item might be slightly different from the color shown on the pictures. - Please allow 1-3cm measuring deviation due to manual measurement.