? 20 Pcs Heavy Duty Hollow Wall Anchors for Thin Walls, M6 x 1 Inch ? Features: Wide Application: Hollow wall anchors consist of screws and anchors, these hollow wall anchors are designed for thin walls and are suitable for hollow panels such as doors and RV walls. Material: The hollow wall drive anchors are made of high quality carbon steel, covered with galvanized coating for rust resistance and durability. Easy To Use: Installation with wall anchor setting tool will save time and be convenient. Installation: Pre-drilled, you need to use a puller to flatten the collar against the back side of the wall.If you don't have the puller tool you can hold the collar with a pair of vice grips while you turn the wall. of vice grips while you turn the screw and it will seat just fine. prevent rotation. Package includes:20pcs metal hollow wall anchors. Description: SPECIFICATIONS Material: Carbon Steel Type: hollow wall anchors Finish: Galvanized Package Includes: 20 metal hollow wall anchors Installation: First drill a hole suitable for the diameter of the anchor, push it in and adjust the screw in the fixing piece, you need to use a puller to flatten the collar against the back side of the wall.If you don't have the puller tool you can hold the collar with a pair of vice grips while you turn the screw and it will seat just fine. prevent rotation.