Calipers are used to measure objects accurately.Yes, that's right. you can also measure anything you want with an accuracy of 0.0005\"/0.01mm.Use this guide to purchase the right pair of calipers for any measurement task.Buy a calipers and what you have been eager to measure will be within your ability.This is not an exhaustive guide, but it will show you the basics.Three general types of calipers will be discussed in this guide.There are more, but they are specialized and ordinary people are of no use to them.Cursor calipers-The basic.These are calipers for people who really like math and they are not willing to confuse easily.Have you used the slide rules?Similar conceptsYou can see how they look in the first picture below.--xa0--xa0--xa0* No dial or display.--xa0--xa0--xa0* The reading must be calculated using the lining increment on the clamp body.--xa0--xa0--xa0* Most difficult to read due to misconceptions.--xa0--xa0--xa0* Shockproof (they maintain good accuracy unless bent ).--xa0--xa0--xa0* Cheapest-$3 can be found-10.Dial Calipers -These calipers have a lined dial that shows the measurement results...go figure.Look at the second picture and see what they look like.These are for those who don't like to do math.All you need to do is add the sliding measurement to the dial measurement and you can start.--xa0--xa0* Display within 0 using dial.001\"/0.025mm accuracy.--xa0--xa0--xa0* 1 revolution on the dial = 0.100\"/2.5mm (for most dial calipers ).--xa0--xa0--xa0* For final measurement, a dial display must be added to the inch/millimeter measurement on the clamp body.--xa0--xa0--xa0* Mild shockproof (gears and racks may be misaligned due to severe drops ).--xa0--xa0--xa0* Relatively easy to use.--xa0--xa0--xa0* Increased cost compared to cursor calipers.Digital Card clampShown 3rd.Are you really not a scholar?This is the clamp for you.The display shows what you want to know.No fuss.Don't throw them away, make sure you have some extra cash to buy these button batteries as you end up opening these calipers a few times in error.--xa0--xa0--xa0* Accurate display is 0.0005\"/0.01mm (controversial, but definitely 0.001\"/0.--xa0--xa0--xa0* Absolute and incremental measurements (zero buttons ).--xa0--xa0--xa0* The most vulnerable to shocks.--xa0--xa0--xa0* If there is oil or dust on the clamp Road, it may cause the accuracy to drop.--xa0--xa0--xa0* Battery with small button.--xa0--xa0--xa0* Most expensive-From $15-100.I recommend a good pair of dial calipers.This is what I use, and it's what most mechanics use.As long as you take care of the digital card tongs and keep them clean, they are OK as they are most vulnerable to damage.Dial-up calipers are the best in my opinion, as you don't have to worry about replacing batteries, they require less maintenance than digital calipers.Some quality/more expensive ($50---xa0--xa0--xa0* Any clamp made of plastic.--xa0--xa0--xa0* Stick to or not smooth Calpiers when in use.--xa0--xa0--xa0* Calipers with glass way (because they are likely to break if dropped ).Buying a set of calipers for $50 is a smart investment for anyone who needs to make accurate measurements of small parts.With care and consideration, they will last a lifetime.Pictures and credit pictures are from www.starrett.com