First of the low velocity powder actuated tools. Hilti is still the only company with a fully automatic tool that is decent. Don't waste your money on a magazine tool that only holds ten pins, the added aggravation of dealing with pin jams isn't worth the cost. I mean really, it only holds ten pins. Is it really worth extra money to load ten pins at a time when you need to stop and fiddle with a pin jam on a consistent bases?