Sturdy braces and reinforcement hardware from Grainger can help buttress interior right-angle joints, screens, windows, furniture, doors and more. Mending plates can help reinforce, attach, connect and splice panels and other residential and industrial applications. Find corner braces, mending plates, chair corner braces, T-plates and flat corner irons here in a variety of sizes and materials. Shop Grainger for durable braces and reinforcement hardware.