Easier to Start Than Other Drywall AnchorsDrills directly into drywall, even if you hit a wood stud. High-Quality Materials and Unique DesignMade of carbon steel and coated with yellow zinc for maximum strength. The split in the ribbed anchors expands on two opposing sides as you tighten the screw, increasing its holding power. Won't Damage the WallNo hole or drilling required. You can easily remove the screw and item, leaving the anchor in the wall for reuse, with no hole left in the wall after use. Multiple UsesThe deep thread design provides strong engagement in 1/4", 3/8", 1/2", or 5/8" gypsum wallboard and can hold up to 66 lbs. Included in the Kit50 pieces of 0.47x1.18 inch (12x30 mm) steel anchors and 50 pieces of zinc screws.