I have a Frankfort Arsenal 6' nondigital that I've had about 15 years. I think I paid $29 for it. It is very smooth and accurate. I also have a HF 4" digital that I'm not very happy with. I was an automotive machinist for many years and have a bunch of different mics with a Chineese set of 1"/4" mics that measure to .0001 that are very good mics and were cheap 30+ years ago. Just under $100 for the set with standards. The one HF digital caliper soured me on digitals.