This flat corner brace is designed for furniture, countertops, shelving support and other applications. Used for reinforcing inside of right angle corner joints. Screw holes are co. Highlights series V115 finish bright brass length 3 inch width 3/4 inch height 3 inch thickness 0.11 inch countersunk mounting hole 0.36 inch diameter x 82 degree hole sizes fit Phillips flat screws sized number 9 drill a pilot hole with a 7/64 inch sized drill bit when using wood screws designed for chests, screens, windows, furniture etc. used for reinforcing inside of right angle corner joints screw holes are countersunk black powdercoat finish for improved weather resistance.