Robust and Reliable: Black industrial metal mounting bracket made of good quality stainless steel, smooth and black surface, corrosion resistant and durable. Mounting bracket: Dimensions 50 x 50 x 17mm/ 1.96" x 1.96" x 0.67"; material thickness 2mm/0.078"; Hole diameter: 5mm/0.196". Package includes: 30 x black mounting bracket 5050mm . Countersunk Hole Design: Round ends and countersunk head allow the L-bracket to be flat after installing the screw, without protrusions that can cause scratchesNote: This product does not come with screws Multi-purpose: Black metal brackets are everywhere to save space, perfect for book shelves, bathroom shelves, garage shelves, exhibition stand, workshop shelves etc