what size drill bit will I need?

I used a millimeter step drill bit with a hex shank in my electric drill. This was what made it possible to install a viewer at a low cost and have one that was large enough I can actually see through!

can use with Metal Door 1.8mm ?

The specifications state what door thickness this can be used on. If you meant 18cm, that is a little over 3" thick. Check the specs. 1.8mm is very thin.

Do i need another piece to go with device. And how can i just use this piece to connect to my phone. This is my first time using this an need some ad

First, this is not for your phone, It is a door viewer that you install in a house door to view who is at your door. No other parts needed for that intended purpose.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Sumnacon Large Door Viewer 220-degree with Heavy Duty Rotating Privacy Cover, Solid Brass Security Peephole for 1.65" to 2.16" Doors for Home Office Hotel, Black

Sumnacon Large Door Viewer 220-degree with Heavy Duty Rotating Privacy Cover, Solid Brass Security Peephole for 1.65" to 2.16" Doors for Home Office Hotel, Black

Product ID: 154957231

Details

Brand
Sumnacon
Color
Black
Exterior Finish
Black Brass
Item Weight
0.11 kg
Material
Brass Plastic

🔍220° ultra-wide view

🔧Fits 1.65"-2.16" thick doors

🛡️Solid brass durability

¥4626

Duties & taxes included

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔒 See more, worry less—security that’s always watching.

EASY DIY INSTALLATION - Hand-tighten design fits doors 1.65" to 2.16" thick—secure your space in minutes without hassle.
ROTATING PRIVACY COVER - Keep prying eyes out with a smooth, heavy-duty cover that blocks reverse peephole spying.
LARGE 28 MM LENS DIAMETER - Crystal-clear optics that outperform cheap plastic peepholes—light gathering at its finest.
PANORAMIC 220 VIEWING ANGLE - See every detail from head to toe and beyond—no blind spots, no surprises.
PREMIUM SOLID BRASS CONSTRUCTION - Built to last with corrosion-resistant, heavy-duty brass for unmatched security and style.

The Sumnacon Large Door Viewer offers a superior 220-degree viewing angle through a large 28mm solid brass lens, designed for doors 1.65" to 2.16" thick. Its heavy-duty rotating privacy cover prevents reverse peephole spying, while the premium brass build ensures long-lasting durability and enhanced security for homes, offices, and hotels.

Specifications

ASIN	B07TVX5MHB
Best Sellers Rank	#81,688 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Door Viewers
Brand Name	Sumnacon
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (2,083)
Exterior Finish	Black, Brass
Item Type Name	Door Viewer
Item Weight	0.11 kg
Manufacturer	Sumnacon
Manufacturer Part Number	ULSMC00392
Material Type	Brass, Plastic
Model Number	ULSMC00392
Number of Items	1
Number of Pieces	1
Recommended Uses For Product	home security, office security, hotel security, monitoring front door activity
Size	28mm
Unit Count	1 Count

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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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TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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¥4626

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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