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The Kynup Digital Caliper is a high-precision, stainless steel measuring tool with a 0-6 inch (150 mm) range and ±0.001 inch accuracy. Featuring a large splash-proof LCD, it offers quick unit switching between inches, millimeters, and fractions. Its smart power-off system conserves battery life by fully cutting power after shutdown and auto-off after 6 minutes of inactivity. Designed for professionals and DIY enthusiasts alike, it measures outer and inner diameters, depth, and steps with reliable stability and durability.







| Asin | B0DCFM86W1 |
| Best Sellers Rank | #11,889 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #21 in Digital Calipers |
| Brand Name | Kynup |
| Customer Reviews | 4.6 4.6 out of 5 stars (878) 4.6 out of 5 stars |
| Included Components | Case; Digital Caliper |
| Item Dimensions L X W | 9.28"L x 3.03"W |
| Item Weight | 7.02 ounces |
| Manufacturer | Kynup |
| Material Type | Stainless Steel |
| Measurement Accuracy | 0.02mm |
| Model | KY-21S |
| Number Of Batteries | 3 LR44 batteries required. |
| Number Of Items | 1 |
| Part Number | KY-21S |
| Range | 0-150mm millimeters |
| Unit Count | 1 Count |
User
Nice Tool.
This is a nice tool, easy to use and accurate. It comes with a sturdy plastic case, instructions, and two extra batteries. The display and printed scales are a good size and easy to read. The dial adjuster makes small, precise measurements simple and easy. Being made of metal ensures it will outlast me. It is definitely worth the cost.
User
Great product presentation and quality at an unbeatable price!
Quite impressed with the value and quality of the product, especially for the fair price! The calipers are sturdy, the adjustment wheel is smooth and firm, the measurements are accurate, and the hold screw keeps your measurement type! It was certainly a change from my previous plastic cheapo, plastic calipers, but I wish that I would've done it sometime ago! These were an incredible step up, and only a small jump in price! The functionality is excellent, keeping your measurements, precise, and easy to use! The product comes cleanly wrapped in a nice box with a sturdy, hard plastic travel, and storage case! They look and feel expensive, while functioning like an expensive set also!
User
Seems good quality
I like this caliper. I like that it has fractional readings also. It’s much heavier than my Hobo Freight model and I don’t have to figure any fractions. I’m lazy like that. It’s perfect for most people. You don’t need a mitutoyo at home.
User
Decent Product, Decent Price--To Be Precise.
Nice tool. Accurate--fortunately. Was nervous about the precision, but is working out so far. Comes in a budget, vacuum-formed case that is reasonable for the item's price and build quality (certainly acceptable). Even comes with batteries. 👍 Does it deserve consideration? If you are not building surgical equipment or a rocket ship to Mars, then, yes. Serves most needs of reasonable scope and precsion. It is a decent product at a decent price.
User
Kynup Digital Caliper - 6”
Extremely nice, heavy, all metal caliper. No slip whatsoever so readings are consistently accurate. Locking thumbwheel, open/close thumbwheel, 3 batteries, and sturdy plastic case. Getting a second to swap out garage caliper. Oh, and only $18!!!!
User
Happy with product
Had this a while now and have used it several times. Works well and comes with a nice storage box and extra batteries. I like you can switch between inches, metric, or fractions. Good caliper for the price.
User
Great tool. Accurate.
This tool will read out to half of a thousand of an inch (.0005). In other words, it will measure a human hair or the thickness of a piece of paper. It is all metal, and looks to be able to take a fair amount of abuse in the shop. It comes with a decent plastic case as well. New out of the box it slides smoothly. If accuracy is important, the small extra cost as compared to other tools that only read to .01" is likely worth it.
User
Heavy all metal smooth and accurate caliper
This is a very well made, high quality and accurate tool. All metal (except plastic screen), solid weight, balance, slide action and feel, very precise and the lock thumb screw is handy too. I purchased a caliper from the TikTok store that turned out to be plastic, not very precise, and the electronics and display went spastic after a few months (gibberish and wouldn’t turn off except by removing the battery). This is a great tool for a great price. Highly recommended!
User
Excellent quality and accuracy, heavy in a good way. Good purchase.
Holy smokes. This thing is amazing value. Don't change the price, don't change the product. The engineers nailed it, and the price is fair for both parties. This has substantial heft in the hand, is made of what appears to be good quality stainless steel, appears to be very accurate and sturdy without slop. It also came with a hard plastic case with adjustment screwdriver and two replacement batteries. I am pleasantly surprised with this purchase.
User
good clear markings.
It looks solidly built and the markings are clear. Hope the battery lasts.
User
Works Great and very well built.
I do a lot of 3D designing. I had an older cheaper digital caliper about 6 years old. I thought it worked great. I decided to upgrade to this one. Am I ever glad I got this one. I did not realize how worn out the old one was. This new one has fractions which is very useful. I highly recommend this caliper.
User
Ignore the other reviews. Inaccurate and nasty materials.
Avoid these. The measuring accuracy is poor and the build quality is even worse. They feel cheap in the hand and the materials grate on each other when moving the Jaws. I wish I saw a decent review of these before committing. I want to return them but they charge for return postage so I'll kepp them and use them for odd jobs where accuracy isn't vital.
User
Not the best
Took longer to arrive than expected.Quality of the product not that great. The slider is rough and doesn’t always shut.
Trustpilot
1 week ago
1 week ago