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 2Pcs 6 Inch Door Bolts - Stainless Steel Concealed Security French Door Locks with Hardwares, Metal Flush Latch Bolts for Composite Wood Double Dummy Door, Black

Sumnacon 2Pcs 6 Inch Door Bolts - Stainless Steel Concealed Security French Door Locks with Hardwares, Metal Flush Latch Bolts for Composite Wood Double Dummy Door, Black

Product ID: 140819298

Details

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

🔒6-inch solid stainless steel bolts

⚙️automatic holding spring tension

🛠️includes rust-proof screws & strikes

28376CFA

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Description

🔐 Elevate your door security with sleek, silent strength — because your home deserves the best.

ROCK SOLID SECURITY - Machined from premium stainless steel for unbeatable rustproof durability and heavy-duty strength.
EFFORTLESS OPERATION - Integrated lever switch with automatic holding spring ensures smooth, reliable locking every time.
DUAL POINT PROTECTION - Recommended installation on both top and bottom of inactive door leaf for maximum safety.
SLEEK CONCEALED DESIGN - Flush-mounted and discreet, perfectly blending with modern décor while enhancing door security.
HASSLE FREE INSTALLATION - Comes complete with rust-resistant screws, strikes, and clear instructions for quick setup.

The Sumnacon 2Pcs 6 Inch Door Bolts are precision-engineered stainless steel flush bolts designed for composite, French, and double doors. Featuring an automatic holding spring and integrated lever switch, these concealed locks provide smooth, reliable security. With rust-proof hardware included, they offer a modern, durable solution to secure inactive door leaves, enhancing both safety and style in your home.

Specifications

ASIN	B07Q349BFJ
Additional Features	Automatic Holding Spring, Integrated Switch Design, Concealed Style
Best Sellers Rank	#30,627 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #68 in Door Latches & Bolts
Brand Name	Sumnacon
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (1,347)
Finish Types	Brushed
Included Components	Screws, Strikes, Installation Instructions
Lock Type	Deadbolt
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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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

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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28376CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Very impressed with the quality and fast delivery. Will shop here again.

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