Bests & Worsts Reviews from Amazon

If you are a professional machinist or fabricator, then it is necessary to buy a $200ish pair of Starett calipers. If you are a homeowner with better than average skills and a decent shop, then these $9.00 carbon fiber calipers are more than adequate to precision measure threads, gun calibers, rotors etc. These six inch calipers go down to hundreths of an inch, more than precise enough for household needs. I checked the accuracy and repeatability of these calipers using 5 U.S. quarters, the oldest one minted in 2006. I measured each quarter’s diameter and thickness at the milled edge 20 times, one by one. The oldest measured .94 dia, the rest .95 (Spec is .955). They measured the same all 20 times. To conclude, these carbon fiber calipers are well worth 9 bucks, and the quality is well within spec for homeowner duty.