This is a remix of This thing. His caliper system didn't work on the widely used Westcott Stainless Steel Rulers with that non-slip cork base I see everywhere (Like here). I modified it to fit that ruler.
caliperbottom.stl | 3.6KB | |
calipers.skp | 224.6KB | |
calipertop.stl | 2.2KB |