The Bostitch BRN175 Bulldog Coil Roofing Air Nailer combines performance and adjustability to handle roofing applications. This light weight 4.8 lb roofing nailer drives 3/4" to 1-3/4" coil roofing nails. It has two firing modes, single sequential and contact mode, which can be selected using the dial above the trigger. In addition, the exhaust cap can swivel so that the exhaust is always pointing away from the user, and the shingle guide under the magazine can be adjusted for proper shingle spacing. The BRN175 also comes with a rubber comfort grip. 7-year limited warranty.