Industrial quality. For use in asphalt and fiberglass shingles, waterproof tar paper, metal drip edges, insulative sheathing, cement board, and other re-roofing applications. Dual action trigger. Adjustable shingle guide for consistent placement. Adjustable depth-of-drive. Hardened wear plates and safety for extended reliability and parts life. Includes tool oil and wrench. Couplers not included.