Designed for use on chests, screens, windows, and furniture, these National Hardware corner braces reinforce right angle corner joints from the inside. Brace size = Phillips Flat Screw size, Drill Bit size4" x 7/8" = #10 screw, 7/64" drill bit6" x 1-1/8" = #12 screw, 1/8" drill bit8" x 1-1/4" = #12 screw, 1/8" drill bit10" x 1-1/4" = #12 screw, 1/8" drill bit | HILLMAN 115BC Corner Brace | Size 4" x 7/8"