Cleaning and saving time - Remove the bolt without losing the anchor . There is no need to use a screwdriver or a screw to pre-drilled the hole to create a significant smaller hole! Reduce dust. Once anchoring , the screw is inserted, the anchor lean tightly on the dry wall. The screw is safe, and the anchor not rotate. Safe and easy to use - you need to bring a fixed metal channel with a fixed metal channel, and then when the bolt is disassembled, the metal channel not fall behind the wall; Less wall damage [Please note, the weight of the plastic belt does not bear any lamps] Professional and extensive applications - dry wall anchors suitable for TV brackets can be installed behind hollow materials. The thickness range ranges from 3/8 inches to 3-5/8 inches. It is very suitable for hanging flat TV, photo frames, lighting devices, handrails, Cabinet, etc. Can be used for dry walls, tiles, concrete blocks, gypsum boards, etc. Always help you save time and improve efficiency! Worry-free shopping - Our heavy-duty wall anchor attached with Bolt, Keep the position and of the anchor, make the installation easier, more than providing installation, providing provision Flexibility, we focus on product quality and attach great importance to customers' shopping experience. Quantity:22PCS Colour: Material:Metal Package Contents: 1set * drywall anchors 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.