The PneuTools SN22160 is a Heavy Duty, Industrial Grade 22 Full Round Head, Plastic Collation Framing Nailer for Log Cabin Construction, Pole Barn Framing, Post & Beam Construction, Overseas Crating, Steel Mill & Oversize Pallet Construction, Heavy Duty Framing, and Road Mat Installation Applications. • The PneuTools SN22160 uses 4 - 6 1/4 22 Full Round Head, Plastic Collated Framing Nails with a shank size of .149 - .181 inches and head diameters of .322 - .366 • This powerful framer?s industrial strength, light-weight die cast housing, and ergonomically designed handle mean comfort and consistant ease of use on the job - every time. • It contains a Convenient Side Handle to help with tool control and accuracy when you are installing large and bulky materials, such as posts, beams, crates, large wooden runners, and timber frames. • It also features an Adjustable Depth Work Contact Element, and a High Capacity Easy Load Magazine.