Hollow wall anchors, also known as molly bolts are used with drywall. Use to securely fasten mirrors, pictures, cabinets, and more to hollow walls. This anchor is an expandable sleeve that slides into pre-drilled hole in the wall. Once the anchor is installed, the screw can be removed and items can be changed without disrupting the anchor. Use for medium duty applications. Diameter: 3/16 In. Short Length: 2-3/4 In. Head Type: Pan Drive Type: Combo Drill Size: 3/8 In. Wall Thickness: 3/8 to 5/8 In. Size: Finish: Color: Pieces in Kit: Maximum Weight (Drywall): Material: Screws Included: