1214BC, 21 x 9 x 18, Black, Corner Brace, Used For Reinforcing 90 Degree Angles By Applying To The Inside Or Outside Of The Corner, Slots For 12 Carriage Bolt, Wider Width Provides Greater Area Of Stability For Long Intersections Of Building Materials, Larger Bolt Holes Provide Options For Structural Support, Black Powder Coat Finish For Improved Weather Resistance