Porter-Cable NS150CR 18-Gauge 1/4 in. Crown 1-1/2 in. Narrow Crown Stapler Kit (Certified Refurbished) Uses standard 18-Gauge, 1/4 in. crown staples from 1/2 in. to 1 in. long Power to drive maximum fasteners into hardwood Rear exhaust to keep contaminates away from work Internal piston catch for consistent maximum power on every shot Nail depth adjustment and nail jam release