Can this be installed in the active door of a steel french door?

Yes, that's how I installed mine.

How does one even install these?

I made a jig with plywood, then pin-nailed it to the doors edge. Set the depth and go at it. Last, clean up the corners with a chisel. Now you’re ready to install the locking mechanism.

Is this marine grade stainless steel for use on the coast?

Cheap Chinese stainless steel. But for the price it should work

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Sumnacon 2 Pcs Door Flush Bolts 6 Inch Flush Bolt for Double Door,Black

Sumnacon 2 Pcs Door Flush Bolts 6 Inch Flush Bolt for Double Door,Black

Product ID: 140819298

Details

Brand
Sumnacon
Lock Type
latch_lock
Material
Metal Steel
Recommended Uses For Product
Residential
Special Feature
Automatic

🔒6-inch solid stainless steel bolt

⚙️Automatic holding spring for secure tension

🛠️Includes rust-proof screws & strikes

Sumnacon 2 Pcs Door Flush Bolts 6 Inch Flush Bolt for Double Door,Black

Product ID: 140819298

Details

Brand
Sumnacon
Lock Type
latch_lock
Material
Metal Steel
Recommended Uses For Product
Residential
Special Feature
Automatic

🔒6-inch solid stainless steel bolt

⚙️Automatic holding spring for secure tension

🛠️Includes rust-proof screws & strikes

135.75 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Description

🔐 Lock in style and peace of mind with Sumnacon’s sleek flush bolts!

BUILT TO LAST - Crafted from heavy-duty stainless steel, ensuring rustproof durability and long-term reliability.
DUAL POINT SAFETY - Recommended installation on both top and bottom of inactive door leaf for maximum security.
EFFORTLESS OPERATION - Integrated lever switch offers smooth, comfortable locking without the clunky push-slide hassle.
HASSLE FREE INSTALLATION - Comes complete with rust-resistant screws, strikes, and clear instructions for quick setup.
STEALTH SECURITY UPGRADE - Concealed flush bolt design blends seamlessly with modern doors for a sleek, unobtrusive look.

The Sumnacon 2 Pcs 6 Inch Door Flush Bolts are precision-machined stainless steel locks designed for double, French, composite, and wood doors. Featuring an automatic holding spring and an integrated lever switch, these flush bolts provide secure, smooth, and concealed locking. With rust-proof screws and strikes included, installation is straightforward, making them an essential upgrade for millennial homeowners seeking both security and modern aesthetics.

Specifications

ASIN	B07Q349BFJ
Additional Features	Automatic Holding Spring, Integrated Switch Design, Concealed Style
Best Sellers Rank	#35,009 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #79 in Door Latches & Bolts
Brand Name	Sumnacon
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (1,358)
Finish Types	Brushed
Included Components	Screws, Strikes, Installation Instructions
Item Highlight	Concealed Security Door Locks for French Doors,Composite ,Wood ,Double ,Dummy Doors,Brush Stainless Steel Finish
Lock Type	latch_lock
Manufacturer	Sumnacon
Manufacturer Part Number	ULSMC00317
Material Type	Metal, Stainless Steel, Wood
Model Number	ULSMC00317
Number of Items	2
Number of Pieces	2
Recommended Uses For Product	Residential Doors
Style Name	Modern
Unit Count	2 Count

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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135.75 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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