Westcott Metric/Inch Ruler, 30cm, 12", Opaque (M-109)

hi I'm Sean Michael Reagan and in today's video cool tools talks steel rules here's a generic desk ruler the smallest division on one of these is usually one millimeter if you're talking metric or 1/16 of an inch if you're talking US units if you just need to trace along a straight edge or take a rough measurement this thing works fine if you're building something however especially something small with lots of parts you're probably gonna need to be more precise that's where the steel rule comes in on this particular model which is us units only the smallest division is one a 64th of an inch which is four times better than your everyday ruler some steel rules even have divisions as small as 1/100 of an inch which is about the thickness of two pieces of paper back to back when you're trying to distinguish lines that close together details of your rules manufacture like its finish rigidit