Our large bore rivet guns are heavy hitting to handle those larger riveting jobs that are beyond the capacity of smaller .401" shank rivet guns. Excellent for driving rivets up to 1/4" diameter. Completely interchangeable with Chicago Pneumatic guns, and has a two-stage trigger. Accepts .498" shank rivet sets and attachments, but we’ve also included at no extra cost a .401" shank adapter (p/n SR498401) that allows you to use .401" tooling. Uses Large Bore .498 shank rivet setsIncludes FREE .401 Shank AdapterIncludes Beehive Retainer SpringFREE 4oz bottle of ATS Tool Oil1/4" Aluminum (3/16" steel) Riveting CapacityTwo Stage TriggerNon-slip Powder Coat Finish900 Beats Per MinuteOperating Air Pressure is between 80 and 100 PSI3/4" Bore x 2-11/16" stroke11.5" Overall Length1/4" NPT inlet. 5 lbs (2.5Kg) shipping weight.