This pneumatic stapler runs 16-gauge staples from 1/4" up to 9/16" long, giving you enough range to handle upholstery, trim, insulation, and general fastening jobs without swapping tools. It's built as a finish stapler that loads from the bottom, so you can reload quickly without stopping to reposition the gun.Arrow designed the PT50-3 to run on standard shop air, operating between 65 and 120 PSI, which keeps it compatible with most compressors already found in a home shop or job site. It's compact and light enough for repetitive work like fastening screen material, backing fabric, or securing insulation batts, and it's backed by a 1-year warranty from Arrow. 16-gauge finish stapler, bottom-load design Fastener range: 1/4" to 9/16" Operating pressure: 65-120 PSI Uses Arrow 504, 505, 506, 508, 509, and 50CT staples Weight: 2.78 lbs 1-year manufacturer warranty