As I alluded in my email to you last month, I have the IR IQv series, 3/8 and 1/2". I also have the 18 Volt Snap On 1/2". Snap On wins hands down. Don't bother buying the IR 1/2" if you want to remove stubborn fasteners. It just doesnt cut it. The 3/8" is good... Login to read more.