I chose this inexpensive tubular micrometer model because I rarely need this tool. I think it's a great tool for the price, and to the best of my knowledge it's accurate for testing. I believe this is an instrument that will last and remain accurate if properly cared for and lined like any instrument in a good shop. Well, now that I have it, I've found a use for it that I didn't even know existed. When it's convenient to measure an unusual shape like a pipe or other irregular, non-planar partβ¦