Framing nailers differ from regular nailers in that they're designed to drive large nails into multiple pieces of wood. Framing nailers are more powerful than nailers designed for roofing, installing siding or finishing projects. However, framing nailers are significantly heavier and more cumbersome than other types of nailers.
Framing nailers differ from regular nailers in that they typically use compressed air to drive nails, while smaller nailers use propellants or battery power. Because framing nailers rely on an external power source, they are less expensive than regular nailers that carry their own. Framing nailers that use propellants or battery power are available, but because driving large nails requires more power than driving smaller ones, these nailers require larger batteries and propellant reservoirs and are consequently more expensive than regular nailers or pneumatic framing nailers.
Despite their name, framing nailers are versatile tools that can be used for multiple projects. While roofing and siding nailers are specifically designed for roofing and installing siding, respectively, a framing nailer can also perform these tasks adequately. However, because framing nailers are more powerful, they cannot be used for delicate applications such as finish work. Also, because framing nailers are designed for driving very large framing nails, they cannot be used for driving brads, tacks or small nails without significant modification.