Reinforced Triangle Corner Brace 3 Inch Zinc Plated Steel Bulk No Screws Hole sizes fit Phillips Flat Screws sized #8. Drill a pilot hole with a 3/32 inch. sized drill bit when using wood screws. Used for reinforcing inside of right angle corner joints. Product design allows for quick and easy repair of general household items. Heavy duty, three sided construction. Screw holes are countersunk. Manufactured from steel for strength.