Stanley Hardware S755-565 992 Triangle Corner Brace in Zinc, 4", 2 piece Authorized Replacement from National Hardware Stock #N337-691 Heavy-Duty Corner Brace Fortifies Inside Right-Angle Corners On Three Surfaces Drill A Pilot Hole With A 3/16" Sized Drill Bit When Using Wood Screws Heavy Duty Corner Brace Provides Extra Strength Joint Reinforcement Heavy-duty corner brace fortifies inside right-angle corners on three surfaces Heavy-duty corner brace provides extra strength joint reinforcement Ideal for box, chest, and crate construction or repair Zinc-plated steel; rust resistant; includes screws for installation Two four-inch braces included