<b>Where to use: </b>My personal experience is to fix our office table, wooden office table usually installed by dowel pin and some hardware screw. When they getting old, the screw no longer work well, I just add 2-3 of this bracket under the table, then it is all good. <br><b>How to use:</b> Just use electric drill to fix the bracket, and the screw attached with this item is 18mm long, you have to check if it is too short or too long for your case.<br><b>Package includes:</b> 30 L brackets + 180 Stainless Oval Head Phillips Wood Screws.