Features: and high quality. Best quality drywall anchors, predrills precise hole in gypsum wall board. The metal material anchors are very and not easy to be broken, resistance in bad environment like high temperature. Anchor is equipped with head for easy application. Serration on both sides of its triangle head section makes anchor to easily hammer into drywall and provides better holding power. Specifications: Product name: Drywall anchors Sizes: Anchors 12 x 30 mm/ 0.47 x 1.18 in /Screws 8 x 30 mm/0.3 x 1.18 in Suit for: Sandlime stone, Aerated concrete, Plasterboard, gypsum block. Fix for: Lamps, picture frames, photo frame. Color: gold material: metal Instructionn: 1. Drilling holes first, the depth and diameter of punching must correspond to the size of the product. 2. The anchors is knocked into the wall with a hammer. 3. Anchors aligns the holes to that it can match the size of wall anchors. 4. Lnsert the screw and twist clockwise. 5. Make sure that the screws are aligned with the Hallow Wall anchors. Package Contents: 4 set Expansion Screws Set(50) 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.