can be used with Ac 220 V country?

No, it can 't be used with AC 220v country.

Does it rotate or vibrate?

Glad to help you, the engraver work by reciprocating motion, the rotary tool works by rotational motion.

I can't secure the screw when the engraving is inserted, what am I doing wrong?

If you mean you can't secure the set screw when the "engraving tip" is inserted, consider the following. The tip should be sticking out about 3/8" to 7/16" if it's properly inserted. If it's sticking out more, it's not in, and you should back out the set screw a little more so the tip will go all the way in and seat in the holder. Make sure you use the Alan wrench that came with the engraver to tighten the set screw. If it still won't tighten, you may have a defective unit (engraving tip holder, set screw, set screw threads, etc) and you should go to the manufacturer's website for their contact information and see if they will help you. If you just purchased it, consider Amazon returns if the unit turns out to be defective and should be replaced.

How is this compared to Dremel 290-05 120V? What type of bits recommended for granite/marble?

According to the feedback from other buyers, Utool Engraver have more beautiful appearance and powerful performance. And the Tungsten Carbide Steel Bits can be used on the granite/marble

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10PCS Engraver Diamond Point Tungsten Carbide Steel Bits & Spare Parts Set for UTOOL Engraving Tool

10PCS Engraver Diamond Point Tungsten Carbide Steel Bits & Spare Parts Set for UTOOL Engraving Tool

Product ID: 172556280

Details

Shank Type
Straight
Brand
UTOOL
Item dimensions L x W x H
3.5 x 5 x 0.1
Tool Flute Type
Straight
Surface Recommendation
Glass Ceramic

💎Ultra-hard diamond tips for precision

🔧Includes Allen wrench for quick accessory swaps

⚙️Tungsten carbide bits with HRA≥80 hardness

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COP 94905

Duties & taxes included

In stock

Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Carve Your Mark with Precision & Power!

BUILT TO LAST - High wear resistance and anti-impairment design guarantee long-lasting performance for your creative projects.
PRECISION MEETS POWER - Ultra-fine grain tungsten carbide bits deliver unmatched hardness (HRA≥80) for flawless engraving.
DIAMOND TIPPED EXCELLENCE - 4 diamond bits ensure smooth, coherent shallow cuts on diverse materials—stone, glass, metal, and more.
EFFORTLESS ACCESSORY CHANGES - Allen wrench and chuck screw included for flexible, on-the-go bit installation and removal.
VERSATILE MATERIAL COMPATIBILITY - Perfect for engraving on hardwood, tile, ceramics, marble, granite, and other tough surfaces.

This 10-piece UTOOL engraving set features ultra-hard tungsten carbide and diamond bits designed for professional-grade precision on a wide range of hard materials. With a hardness rating of HRA≥80 and included Allen wrench for quick bit changes, it offers durability, versatility, and ease of use for millennial pros who demand flawless craftsmanship.

Specifications

Best Sellers Rank	#11,114 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #14 in Jewelry Making Engraving Machines & Tools #1,670 in Craft Cutting Tools
Customer Reviews	4.4 out of 5 stars 277 Reviews

Reviews

A**R

it works

great product

27.04.2026

G**T

Great

Good

12.12.2025

W**R

Fast shipping

As described

30.05.2025

R**T

Great product

Very durable.

11.08.2024

S**S

Great bang for your buck!!

This was what I was looking for and won't have to get anymore for a while. Do be careful opening the ziplock as it can tear away from the bag... Going to purchase some super glue and should be all set in fixing that issue. You can't beat the price for the amount you get.

8.03.2024

H**6

Great set!

Very pleased with this product. Nicely made and works well. Would buy again or for family!

11.04.2024

E**M

Maybe

Naw

22.10.2020

M**O

Works on steel

Got these to etch vin# on my catalytic converter. I used the tungsten carbide ball head; found it easy to etch and it did the job.

22.09.2023

X**F

Easy to handle

Had tools like this before this is the best. Easy to use and very powerful

3.02.2021

A**N

eh its better than nothing

it does a ok job probably for wood scratches brass doesnt dig in and engrave

3.10.2020

M**E

Dremel

OK for money

5.10.2021

A**T

Simplistic

Engraving pieces of flat rock

19.02.2021

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