Tile Backer Board Washers Product Details1.Easy To Install - Firstly ensure the wall is clean, flat and dry.Peel off the plastic paper on the back of the self-adhesive nail plate,and attach the base of the insulation nail to the ceiling or wall and pierce the insulation panel into the nail.To ensure stability, you should place at least one nail at each corner of insulation panel.Secure the panel in place with self-locking washer,bend over or snip off additional spindle,finally cover the pin with dome cap for an aesthetic finish.2.Package included - you will get 100 Sets (self stick insulating pins, self-locking washers round and insulation dome cap washers), 3 pieces of a set, sufficient quantity can meet your daily needs and replacement, it is a nice tool combination.