The Spotnails PSA1116 pneumatic upholstery stapler drives 1/4" to 9/16", 20 gauge 3/8" crown staples. Includes one-year warranty and plastic carrying case. This lightweight yet powerful stapler features an adjustable exhaust. The PSA1116 boasts a new design for improved overall performance. The Spotnails PSA1116 upholstery stapler is excellent for roofing felt and upholstery. Tool runs Spotnails A-11 Series staples.