Forget the stackable brass bars, forget the digital gauges with batteries that always die at the wrong time, this little tool that has been around for over 20 years, runs circles around them all! I have two in my shop, and one in fact is at least 15 years old. Nothing to wear out, no batteries to die. I am still finding new ways to use them as well. Check it out. Here’s a brief write up with pics that I did on this great tool.