HARFINGTON Outside Micrometer 0-1' 1'-2' 2'-3' 3'-4' 4'-5' 5'-6' Measuring Tool 0.0001' Graduation 6in1 Set

For the price they are great packaging was super.

I expected 6 frames and one micrometer barrel but each frame comes with its own micrometer. This is much faster and more accurate for people who measure a variety of sizes. Each micrometer comes with a small ratchet drive on the end to limit the torque you can apply, which strikes me as a very professional feature. The wooden box seems very sturdy as well, constructed of approximately 3/8" solid wood with tongue and groove joinery.One photo above shows the 1" micrometer measuring the 1" gauge block' I did not adjust the zero.My only regret is that the gauge blocks do not come in resealable, airtight plastic capsules to protect them from corrosion but, if they are SS or chrome plated that issue may be moot.Since it is such a nice set I think it warrents dovetail or box joints

Mics look good, but the box is damaged upon arrival

I got this Harfington multiple outside micrometer caliper set because it looked interesting especially for the price. Outside micrometer calipers able to measure to the one 10,000th of an inch accurately for up to 6 inches in size was a big come on for me since I only had zero to 1 inch capacity outside micrometers. Overall, I was not disappointed.As in the Amazon description you get 6 calipers: 0-1in, 1-2in, 2-3in,3-4in, 4-5in and 5-6in. However each one can measure a little more-the 2-3in can measure up to 3.0020. And all except the 0 to 1 inch micrometer caliper can measure a little less than their stated lower limit.The anvil and the spindle end appear to be carbide (as in the Amazon description) rather than the lower end hardened steel; which is great even though I won't be using them every day. Fortunately the set also comes with five gauges: 1, 2, 3, 4 and 5 inch long rods, about a 1/4 inch diameter with dead flat ends in order to verify the calibration of the corresponding micrometer caliper and re-zero when needed. Each has a plastic mid-piece (marked with its size in inches) to prevent it from changing length by thermal expansion from your finger's heat. Note that while there are six calipers there are only five gauges; but that works out fine because each gauge can be used to verify more than one caliper: each caliper except the 5-6 inch caliper can be verified at both its lower and upper limit i.e. the 3 inch gauge can be used to check both the full opening of the 2-3 inch caliper and the zero point of the 3-4 inch caliper. Naturally the 0 to 1 inch caliper has a lower limit of zero and you don't need a gauge for that.The micrometer calipers have excellent build quality, rotate smoothly, ratchet-stops operate correctly and the calibrations are easy to read. Out-of-the-box each of the calipers was exactly zeroed. The calipers have remained accurate to the nearest 0.0001 inch. The only uncorrectable faults (but there are workarounds so only minus one star) I found in the whole set was not with a micrometer caliper but rather with two gauges: the 2 inch and 4 inch gauges which I noticed from a digital vernier caliper (see photo) that I was checking for accuracy/quality: it was dead on on all the other gauges but these two it was saying were a little bit too long. Actually 0.0010 inches too long for the 2 inch gauge (that is ten 10000ths of an inch) and the 4 inch gauge was 0.0020 (that is 20 10,000ths) inch too long as measured by both the 1 to 2 inch, and 2 to 3 inch calipers for the 2 inch gauge and the 3 to 4 and 4 to 5 inch calipers for the 4 inch gauge. Those two calipers were verified as accurate by the 3 other gauges and 2 digital vernier calipers. The workarounds are 1) To not use either of those two gauges but rather use the other three gauges to recalibrate or verify all six calipers but then you can only verify either the lower limit or the upper limit but not both for some calipers; verify at one end for some of the calipers 2) get replacement gauges either from the manufacturer (I haven't checked yet) or on the open market. Or 3) just use them as is since their sizes are known. Or 4) Since the gauges are oversized and don't have carbide ends I could visualize somebody with more skill than I could remove metal from one end of each to basically recalibrate them.The gauges are a very important part of the set to have as reference standards but they are difficult to manipulate, especially the longer ones: it's hard to hold all three points at the same time, that is the connection of the gauge to the anvil, the connection of the gauge to the end of the spindle and at the same time manipulate the barrel/ratchet stop. The ends of the gauge have to be in perfect flat contact with the corresponding parts of the caliper to get an accurate check but it is very hard to hold everything in alignment. I was able to develop an external hold system: I cut off small (5 mm long) pieces of a flexible silicone straw from another product I already had (Amazon) and slid them on the ends of the gauge. Since the anvils, spindles and gauges are all approximately 1/4 inch (outside) diameter (see photo) and this straw also had an inside diameter of an appropriate size that it slid snugly onto both micrometer ends and gauge ends so I could use these these silicone connectors to hold the gauge to the appropriate ends of the micrometer caliper in alignment while I held the caliper in one hand and manipulated the barrel/ratchet stop in the other. Naturally I made sure everything was in perfect alignment before taking the final reading; even a very slight misalignment adds apparent length.I also noticed that the fixed plastic piece on the center of the gauges was not firmly fixed in place and could be slid back and forth with effort. (see photos) It is also perfectly round and rolls easily: one rolled off my table several timess (no damage). Suggest they be made with one flat side opposite the size marking.So how do you store six calipers, five gauges and one adjustment tool in an orderly manner? They provide an outstanding foam lined plain wooden box: 12 11/16 in x 7 5/8in x 6 1/16in (32.2cm x 19.4cm x 15.4cm) (LxWxH). No logo or markings, 1/2 inch (12.5 mm) thick top, bottom, sides, front, back, clear (very few knots) solid wood (not plywood) unless you look carefully you won't notice that the large panels are made of smaller pieces of wood nicely scarfed together, natural finish (not painted or stained); probably one coat of polyurethane finish, two hinges on the back, two latches on the front and two carry handles on the sides. All metal hardware. The real deal: no plastic. The two latches are slightly different design than what is shown on the Amazon description.In conclusion: very highly recommend. Old school-not digital-but you can smile all the way to the Bank because of the money you saved. I am very impressed that the Harfington company can put out this large a set of this good a quality for less than $90.