By utilizing a reliable Alligator anchor to supplement your screws

With solid surfaces

#52 Heavy Duty Drill Bit - Stubby Length

59/64 x 6 Reduced Shank Drill Bit (1/2 Shank)

4-40 x 1/4 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10,000) 5/8-18 Hex Cap Screws 18-8 Stainless Steel By utilizing a reliable Alligator4 40 x 1 4 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10,000) . Black Zinc is an acidic, low temperature powdered product developed to impart a black conversion coating of zinc die casting, galvanized stock and electroplated zinc parts. The black coating serves as a base for organic coatings (lacquers, paints, waxes and oils) and also provides an esthetic appeal.