Porter-Cable US58 1/4-Inch to 5/8-Inch 22-Gauge C-Crown Upholstery Stapler Uses standard Senco Type, 22 ga. 3/8-inch crown staples from 1/4-inch to 5/8-inch long Small and lightweight for ease of operation 1-inch nose extension for limited clearance fastening Steel top cap for durability Rear exhaust port channels air and tool oil/condensation away from user; Driver guide moves back with magazine, allowing jams to be easily cleared when magazine is open