Anytime Tools 6 pc 5/16" - 6" PRECISION TELESCOPIC T BORE GAUGE SET

For the price they're okay. When you tighten down the lock it seems to retract just a little bit. They're not as accurate as the good stuff but then again, when someone breaks in to your shop and steals all your tools you won't have much of a loss.Truth is, the ends are pitted and uneven, these aren't the smooth polished expensive ones that will get you precise measurements. They're more less for a backyard mechanic that has a cheap inaccurate set of micrometers that isn't worried about his reputation.If you're planning on using these for work you may as well just close shop because they're that bad, they'll get you inaccurate measurements every time unless you're some sort of wizard and can get them to work right.The operation is extremely rough and catchy as if they are filled with sand and the ends are bumpy and pitted. I don't have a good camera for close up pictures but I did manage to get a couple with my phone. It looks worse in person. The picture doesn't pick up the uneven wavy dome shape and flaking metal. it's full of pits and flakes on the ends.

I've had these for a few months and for the price the are great. I hadn't reviewed because I had nothing to compare to, however my work just bought an expensive set of Mitutoyo and the two feel and operated very similarly. Mine were delivered in a red case so maybe there was a change. Mine are not perfectly polished but are much better than some of the pictures show without any signs of scratches or pitting and are very comparable to the Mitutoyo. I noticed when comparing both sets that both would spring out and read large using the traditional method of tilting the gauge through the bore. I had better results with both getting the gauge as straight as possible before locking and sliding straight out. This alleviates the need of the plungers to be pushed in against the lock. Technique and feel seem to be required for both sets, so I'll take the one that is 1/10 the price.

In theory they seem to work, but in practice they struggle. The knob that locks them in position, isn't working well on one of the ones I needed to measure my engine bearing inside diameters. When you tighten it, it stays, but when you try to measure it with a calipers or micrometer, then bores move inwards, giving bad too small readings. I tested it by tightening the knob, and then softly squeezing the tool, and you can feel it moving.Very cheaply designed...and not worth my time or money. I'm unfortunately outside the return window by a little. I would not recommend this product.

After getting delady and delayed, Amazon told me to do the refund. Then of course they show up. They sounded like they had grit inside them and they were poking through the bottom of the case. I still sent them back and ordered an accusized set. Much better quality these this set, came in a nice plastic case and no grinding marks. I tried.

I am an old time gear head kind of guy (53 years old), and have rebuilt about a dozen engines over the years. I like this set of T-bore, snap gauge set, along with the micrometers, mostly because of their affordability. In the past, I have had access to Starrett micrometers when gauging pistons, cylinder bores, and rod & main bearings. This set is of a lower quality than that of a Starrett, but I found it to still be quite good. I have found that you are going to pay four to five times for Starrett equipment, but all I really do now, is measure pistons, cylinders, rods & mains for a rough assessment, to determine if I am going to bore the cyliders .020" over, or turn the crankshaft .010" under, etc. I let the local machine shop perform their magic, where they do have the super-duper micrometers, that are critical for their operation. So unless you are going into the machine shop business, why spend the high bucks for superior equipment, for just an initial assessment. I have found these mic's to be plenty satisfactory. If you are going to measure cylinders, you obviously would need an inside measurement, so I bought the telescoping, snap, T-gauge set also. They worked just fine, very pleased with both sets. I also bought the cylinder bore micrometer set, that uses a regular style dial indicator, where you are measuring not so much the actual bore, but rather difference in the bore, to see if the cylinder has a taper to it, or has a whiskey barrel shape to the cylinder, etc. I found it be somewhat useful, but the afore-mentioned micrometers with a telescoping, snap T-gauge sets,to be more useful.Just my two cents worth ......