Product Overview CRL Toggler SnapSkru Self-Drilling Anchors are designed to maintain the integrity of drywall during installation and removal. They can accommodate a range of screw sizes MINI: #6 (recommended) to #8, and Regular: #6 to #10, #8 (recommended). The screws can be removed and replaced without the anchor coming out of the wall. Not only that, these anchors provide more holding power in 3/8\”, 1/2\”, or 5/8\” (10, 13, or 16 mm) thick drywall and ceiling. An audible \”pop\” assures you of correct installation.