Amateur upholsterers use serrated knives to cut through furniture foam. Professionals use an automatic foam cutter. These cutters have a serrated blade the shifts up and down to quickly cut through foam. Because the knives are sharp and fast, they cut a straight line. Most of the knives have a long blade that extends to a square pad. Upholsterers push the foam above the pad to cut it or they guide the knife along the pre-drawn line.
Professionals use an industrial-grade stapler rather than a normal staple gun to secure the upholstery to the furniture's frame. These tools work just like a staple gun, except that they are supplied with power from an air compressor rather than from a motor. This method delivers staples into the furniture frame faster to create a tighter fastening.
Awls allow you to sew very thick upholstery material such as leather, canvas or thick and nubby linens. Awls also make it possible to sew when you only have access to one side of the fabric. Awls have a curved needle that upholsterers poke into the furniture and back up from behind it. Automatic awls essentially machine stitch upholstery from the outside.