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Title: Good, but not great in old concrete
Review: Using this gun in older concrete (30 year old, in my case) yields mixed results. If I could get the correct size nails, I'd probably fare better. I am attempting to fasten 1 inch thick material to the concrete, and it has some issues. With 1-3/8" nails, it lacks good holding power, but it doesn't have the power to drive a 2-1/8" nail into the concrete. It is penetrating to a depth where a 1-5/8" nail would be fully set, and if the nails were that length, it would work fine. Using it to hang 3/4 inch plywood on the wall with the 1-3/8" nails worked fine, as did hanging 2x4 on the wall with 2-1/8" nails.So, while not perfect, it still beats using a "hilti gun" (the 22 caliber cartrige type guns) to drive nails in concrete.-Tom
