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

Product ID: 403593382

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

💎4 Diamond Bits for ultra-smooth engraving

🔧Allen Wrench + Chuck Screw for quick accessory swaps

⚙️4 Tungsten Carbide Bits with HRA≥80 hardness

R560

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

💎 Carve Your Legacy with Precision & Power

PRO LEVEL FINISH - Diamond bits leave smooth, coherent shallow marks, elevating your craftsmanship to gallery-worthy precision.
VERSATILE MASTERY - Compatible with UTOOL and most rotary tools, perfect for stone, glass, metal, hardwood, tile, ceramics, marble, and granite.
PRECISION MEETS POWER - Ultra-fine grain tungsten carbide bits deliver unmatched hardness (HRA≥80) for flawless engraving on tough materials.
LONG LASTING PERFORMANCE - High wear resistance and anti-impairment design ensure your bits stay sharp and reliable through countless projects.
EFFORTLESS ACCESSORY CHANGES - Includes Allen wrench and chuck tightening screw for fast, flexible bit installation and removal—no downtime.

The UTOOL 10PCS Engraver Set features 4 ultra-hard tungsten carbide bits (HRA≥80) and 4 diamond bits designed for smooth, precise engraving on a wide range of hard materials. Equipped with an Allen wrench and chuck screw for quick bit changes, this durable set offers high wear resistance and long tool life, making it ideal for professionals and enthusiasts seeking flawless results with their rotary tools.

Specifications

ASIN	B07YWH1Y5J
Best Sellers Rank	#153,201 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #208 in Engraving Tools
Brand	UTOOL
Color	10pcs bits
Customer Reviews	4.5 4.5 out of 5 stars (273)
Date First Available	12 December 2019
Item Weight	100 g
Material	8 Bits + 1 Wrench + 1 Screw
Model Number	PEB0101
Power / Wattage	24 watts
Product Dimensions	8.89 x 12.7 x 0.25 cm; 100 g

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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