Self-Drilling Anchors Screws: Knock, Insert, Tighten - Quick and Convenient Installation. No Need to Drill: Easy Operation, No Damage to Wall - Wall Screws Premium Material: Carbon Steel, Yellow Zinc Plated - Maximum Durability and Holding Power. Quick Breakthrough: Concentrated Focus, Strong and Reliable - Drive Screws into Drywall. Wide Application: Hang Objects with 66 Pound Maximum Weight - Specially Designed for Drywall. Wide Application: : These self-drilling anchors and screws are suitable for installing drywall in homes, offices or any other buildings; hanging items on your home decoration, such as curtains, wall lamps, murals, partitions, pipelines, picture frames, clocks, plants and more. Quantity:50Pcs Colour:Yellow Material:steel Package Contents: 50 * Gypsum board expansion 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.