An industrial strength slight/medium head pinner that fills the gap between 18 gauge brad nails and 23 gauge micro pins. The 21 gauge pins offer significant holding power while leaving a much smaller indent than an 18 gauge brad. Magazine automatically adjusts for different fastener length. Reversible belt hook. Rear exhaust with embedded muffler. Ergonomic handle for comfortable all-day operation. Last nail lockout prevents dry-firing. Ultra-narrow nose allows easy access to mill work and tight corners. On board storage for extra no-mar pad and jam clearing wrench. Use for applying decorative trim, molding, paneling, picture frames, rattan, trim and finish. 1/4" NPT air inlet. Weighs 3.15 lbs (1.43 kg). 8.89"H x 7.87"L x 1.85"W. Fastener capacity: 170.