have french doors to patio that have a 3 1/2" clearance from bottom of door to floor. Is this one long enough?

You will be 1/2 inch short. From the bottom of the mount (not the two mounting holes as they are further up from the bottom of the mount by about 1/4 inch) to the bottom of the rubber tip is 3 inches when extended so the tip is flat with the floor. Even if you mounted the stop at the very bottom of the door you would be 1/2 inch short.

Does it come with screws for attaching it to the door? If so, are they wood screws?

it come with screws that match the finish of the door stop. They are wood screws but they will work on metal doors also.

I have one similar to this, and it became loose over time, to where it doesn't stay in the up position. Can this be repaired?

Cheap enough to replace not repair. Mine doesn't look like it can be repaired but it still works great,even after a year or so.

could this item be used as a security method, from an intruder kicking in the door?

My opinion (based on substantial security planning experience) is that it would slow down someone trying to force the door but would not stop a forced entry. The part of the doorstop in contact with the floor is only rubber or plastic and would not last long against forced entry. And of course you would have to install it on the inside of the door -opposite from a normal installation

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National Hardware Kickdown Door Stop, 4", Die Cast, Satin Chrome

National Hardware Kickdown Door Stop, 4", Die Cast, Satin Chrome

Product ID: 718787

Details

Brand
National
Color
Satin Chrome
Finish Type
Chrome
Global Trade Identification Number
Manufacturer
National
Material
Plastic

🦶ribbed rubber non-slip foot

🦾4" heavy-duty die cast zinc

🛡️spring-loaded secure hold

₨332

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚪 Hold the door, not the hassle — kick it down in style!

FLOOR FRIENDLY GRIP - Ribbed rubber foot ensures no-slip hold on any surface while protecting floors from scratches.
SLEEK LOW PROFILE - Modern satin chrome complements contemporary interiors with minimal maintenance required.
WALL SAVING INNOVATION - Prevents costly dents and scuffs by stopping doors before they hit walls or furniture.
DURABLE SATIN CHROME FINISH - Corrosion-resistant die cast zinc body built to withstand high-traffic office or home use.
KICKDOWN CONTROL HANDS FREE - Spring-loaded mechanism locks door open effortlessly—perfect for multitasking pros.

The National Hardware Kickdown Door Stop is a 4-inch, die cast zinc door stopper with a satin chrome finish, featuring a spring-loaded mechanism that securely holds doors open while protecting walls and floors. Designed for durability and ease of use, it offers a non-slip ribbed rubber foot and a sleek, corrosion-resistant build ideal for both residential and commercial spaces.

Specifications

ASIN	B000CSN1EW
Best Sellers Rank	#32,755 in Office Products ( See Top 100 in Office Products ) #237 in Door Stops
Brand Name	National Hardware
Color	Satin Chrome
Customer Reviews	4.4 4.4 out of 5 stars (1,684)
Finish Types	Chrome
Global Trade Identification Number	00038613273535
Included Components	Kickdown Door Stop Sc 4
Item Dimensions L x W x Thickness	2.75"L x 6.63"W x 1"Th
Item Highlight	Spring-Loaded Foot Pedal with Ribbed Rubber Tip Holds Doors Open and Protects Walls; Mounts to Door Base
Item Type Name	Kickdown Door Stop Sc 4
Item Weight	9.07 g
Manufacturer	National Hardware
Manufacturer Part Number	N273-532
Manufacturer Warranty Description	Warranty
Material Type	Plastic
Model Number	N273-532
Mount Type	Plate Mount
Number of Packs	1
Number of Pieces	2
Product Style	Updated Packaging
UPC	038613273535

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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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