All steel construction with high carbon hardened steel parts. With rapid ergonomic function, it offers strong penetratingpower and quick excellent performance. Single-handedergonomic grip for easy operation. APPLICATION: Apply to asphalt shingles on roofs plywoodon sub-flooring, metal lath, under course shakes, assemblingshipping crates and a wide variety of other extra heavy-dutybuilding and industrial staple-nail applications.