1217BC, 3, 24 x 18, Black, Powder Coated Steel Corner Brace, Used For Reinforcing 90 Degree Angles By Application To The Inside Or Outside Of The Corner, Square Shape Multiple Bolt Slots Per Side Provide Greater Area Of Stability For Wider Pieces Of Building Materials, Chamfered Corners Provide Decorative Look, Available In 2 Thicknesses Of Material For Variety In Application Need, Boxed Loose