Fasten instantly into concrete, steel or masonry, Light and portable-3-3/4 lbs, Sets 1/2"" to 2-1/2"" power fasteners and 3"" washered fasteners, Uses 22 caliber low velocity power loads, Trigger-activation for easy overhead use, Faster than drilling, Fastens wood framing, conduit straps, mailboxes, shelf brackets, junction boxes and much more, SKU: HMREX1303