Do this work on doors with molding?

Yes they do. I used them on 4 different doors, all with a different kind of molding, and they work absolutely great!! I'm very pleased with them.

Would the chain break if someone tried to forcefully enter through the door? (not talking about the screws just the chain)

Yes. My medium-sized dog tried to get through the door I 'secured' with this, and the anchor at the end of the chain popped right off.

Has anyone installed this on a solid wood door? I’m afraid it might split the wood?

Pre-drill the holes. The quality of the chain was very weak though.

Instructions for installing door lock?

Easy to install, you just need a screwdriver and it will not protect against strong pressure on the door! Only if the children do not come out

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Prime-Line U 9909 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction and a Dull Chrome Finish (Single Pack)

Prime-Line U 9909 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction and a Dull Chrome Finish (Single Pack)

Product ID: 141979531

✨Solid brass with satin chrome finish

🔒6-inch, 8-link welded steel chain

🛠️Quick & easy installation with included fasteners

Description

🔐 Elevate your door security game with style and peace of mind!

CHILD SAFE PLACEMENT - Install out of reach to prevent kids from opening doors
DIY FRIENDLY INSTALLATION - All hardware included for a hassle-free upgrade
DURABLE SOLID BRASS BUILD - Long-lasting strength with stylish satin chrome finish
UNIVERSAL FIT VERSATILE - Fits various door types, installs over or beside casing
SECURE PARTIAL DOOR OPENING - Allows safe viewing & ventilation without full door access

The U 9909 Chain Door Guard is a robust security lock featuring a 6-inch, 8-link welded steel chain housed in solid brass with a satin chrome finish. Designed for easy DIY installation on most door types, it enables partial door opening for safe viewing and ventilation while enhancing child safety by restricting door access. This durable, stylish lock is a practical upgrade for home or office security.

Specifications

ASIN	B004AHR9S0
Best Sellers Rank	#94,950 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #264 in Door Lock Replacement Parts
Color	Satin Chrome
Customer Reviews	4.6 4.6 out of 5 stars (1,534)
Date First Available	February 22, 2013
Finish	Chrome
Included Components	lock, keeper and fasteners
Item Package Quantity	1
Item Weight	4.6 ounces
Item model number	U 9909
Manufacturer	Prime-Line Products (Home Improvement)
Material	Steel
Part Number	U 9909
Product Dimensions	3.31 x 0.63 x 2 inches
Size	3-15/16 in.
Style	Standard
Warranty Description	Goods are warranted against manufacturing defects for 1 year.

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