Introducing the new ATS Pro Series X-Guns. The standard tool used in aircraft manufacturing plants such as Boeing and Lockheed-Martin has just gotten better! We've retooled our popular Pro X- Rivet Guns to make them smoother and more powerful, while still keeping them completely interchangeable with Chicago Pneumatic rivet guns. They are slow hitting with excellent finger tip control. 1/4" Aluminum (3/16" Steel) Rivet Capacity. Accepts all .401 shank rivet sets and attachments. Includes both Beehive & Mechaid Retainer Springs, plus a FREE 4oz bottle of ATS Tool Oil. Non-slip Powder Coat Finish. 1/4" NPT Inlet. Lifetime ATS-Pro Warranty. 4 lbs (2Kg) shipping weight.