Do not purchase a Universal Clamp(s) if a Standard Clamp will work. The weakest parts of any clamp are the screw in bolts that hold it to the tabletop. Therefore if you are using a Universal Clamp with a 1″ thick table you will have over 2″ of the screw out of the clamp and pressing into the table. This will allow any stress from the arm to be loaded on to the screws and increase the likelihood of them bending. You should purchase the 1″ Standard Clamp unless necessary.
If you have purchased this Universal Clamp in order to get past the table frame, but the table top itself is only 1″ thick, we recommend adding additional support.
One solution that is common is to cut a 2ʺ x 4ʺ (1.5” thick) the size of the clamp (6”) and place it between the table bottom and the cup washers on the top of the screws of the clamp. This will shorten the distance the screws go in and make it much harder for them to bend. Use a few drops of wood glue and this will keep the block in place.