Pressure gates require a strong tension fit between two walls. Apply too much pressure and you are left with a hole in the sheet rock wall. The pads have a 4 inch diameter, greatly increasing the surface contact area between the pressure gate and your walls. There are no tools required for installation. Simply install your gate as usual placing the cups between the gate's pressure pads and the wall. The rubber backing on the helps to grip your walls, leaving no wall damage, and makes the gate more difficult for a child to dislodge. The Kid Kusion are Designed to be the same thickness as most base borads. If your home has floor baseboards, use the at the Top of the Gate to even out the Distance, thereby makeing your pressure gate more secure