L.H. Dottie Wall driller anchor is used only in drywall and has a better pullout as well as shear values. Anchor is installed by inserting Phillips or square drive bit. It is made of durable zinc or nylon and use the same bit to insert the proper sheet metal screw to mount the fixture. It has drywall size of 3/8, 1/2 Inch and is used screw size of 6. Anchor is easy to spot.
