3PLUS H2190SP 21 Degree Full Round Head Framing Nailer Uses 21 degree 2 inch to 3-1/2 inch full round head plastic collated framing nails Tool-free depth adjustment for precise flush or countersink nailing Multi-directional exhaust cover rotates 360 to direct exhaust air away from user; no-mar tip eliminates damage to working surfaces Hardened claw tip reduces wear on the nose and minimizes slippage when toe-nailing Dry-fire lockout feature extends motor life and prevents missing nails; with single sequential trigger installed