Skid Clamp Anchors for Hollow Walls Model HDW-ANC-TOG-8These high-tech plastic anchors hold securely in 1/2 and 5/8 drywall. Easy to install, they make a satisfying pop sound when they re fully engaged. The small diameter head sits flush with the wall surface and is completely concealed by the Skid Clamp base, making for a super clean installation. Recommended for use with STC8090 Skid Clamp Assemblies Includes: 4 Self-drilling Hollow Wall Anchors 4 8 x 1-1/4 Truss Head Sheet Metal Screws Â