CornerGuard.net: 3/4" x 3/4" x 96" x 16 Gauge Stainless Steel Corner Guard, #4 Finish
Amazon.com: 22 Pack Heavy Duty Corner Bracket 4 X 1 Inch Corner Brace for Wood, Stainless Steel Corner Brace L Corner Bracket Joint Right Angel Bracket Fastener for Wood Cabinets Furniture(100X25X2mm) :