Hole sizes fit Phillips Flat Screws sized number 5. Drill a pilot hole with a 5/64 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. Double wide brace for greater stability. Screw holes are countersunk. Manufactured from steel for strength. 1-1/2 inch x 3/4 inch antique brass hole sizes fit Phillips flat screws sized number 5 drill a pilot hole with a 5/64 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 double wide brace for greater stability screw holes are countersunk manufactured from steel for strength.