The Best One Step Drywall Anchor - No drill bit needed - Works in shallow wall applications - Use #2 or #3 Phillips or Square Bits - Takes 4-6 screw - Large head prevents anchor from being pulled through the wall board during installation - Precision centering point - Clean cut, clean hole, anti-rotational device built in tapered body with special, unique flat threads compresses material, providing superior fit, stability and a more positive lock. 0 to 1/2" wall thickness.