3plus ht5014sp pneumatic 20 gauge stapler, t50 upholstery stapler, 1/4-inch to 9/16-inch 3plus this 3plus upholstery stapler drives 20 gauge 1/4'' to 9/16'' staples, you could use arrow t50, stanley tra700, surebonder no. 4 and similar fine wire staples. it is perfect for trim moulding, upholstery jobs, furniture and other small craft projects. drop-in loading design provides both ease and speed when reloading, changing sizes or clearing a jam. a lightweight aluminum body and comfortable rubber soft grip reduce user fatigue. it features a trigger safety mechanism which prevents accidental firing of tool, remember to rotate it from center safety position to the left or right side of trigger before shooting nails. it's a comfortable, fast, and durable stapler which would help you finish work efficiently. magazine capacity holds up to 100 staples, you can use with a pressure operation of 60 to 100 psi.