ITEM NAME:50x 20*20mm 304 Stainless Steel L Shape Corner Brace Joint Right Angle Bracket M.This Internal braces serve more as structural supports to strengthen corner joints against compressive failure. Bracket Size : 20 x 20 x 15mm / 0.8" x 0.8" x 0.6"(L H W) Hole Dia. : 4.5mm / 0.18". 50 x Angle Brackets.