Features: Expansion designs: When you tighten the screw, the ribbed Anchors's crack will expand on the opposite side to increase the holding force. No drilling: No need to drill holes in wall. When removing the Anchors bolt, just stretch it on wall and it will not damage your wall. Easy to use: The self-drilling Anchors adopts a tapered tip designs, which makes installation and disassembly easy. Not easy to loosen: There are serrations on both side, which increase the suspension force of the metal Anchors to 66 pounds. Wide ranges of applications: very suitable for hanging various items on your home decoration, such as photo frames, wall lamp, curtains, clocks, plant. Specifications: Materials: Carbon steel and galvanized Quantity: 20pcs/50pcs/100pcs Size: As shown in the picture Package Includes: 20pcs/50pcs/100pcs Self-Drilling Anchors Screws note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.