corner brace alamic right angle bracket stainless steel black corner braces joint right angle bracket shelf bracket with screws 20 x 20mm - 12 pcs alamic <br><b>brackets size:</b> 20 x 20 x 15.5 mm / 0.79" x 0.79" x 0.61" (l x w x h) <br><b>hole diameter:</b> 4.5 mm/ 0.18". <br><b>hole quantity:</b> 2 holes<br> <br><b>package included: </b> <br>12x corner braces <br>24x screws