Sometimes you have to remove legs from a sofa or loveseat to get them to fit through an opening into the home. If you are doing this yourself, you will think those are # 2 Phillips Screws holding on those legs - they're not (in most cases). What they are is a # 2 Square Drive, and if you use a Phillips screwdriver you will probably 'cam out' the head of the screw and destroy it. The industry uses that # 2 Square Drive bit because they are faster and more steady in tool holding power. You can buy a bit at a hardware store for a buck or so.