will this work on a door closing arm that is parallel to the door rather than perpendicular?

This should work the type of door you are describing. Please visit www.bilco-barracuda.com for more detailed information on each Barracuda model.

Will this item slip over a door closer that measures 7 inches across the arms?

The door closer is adjustable. This must be used with DSI or DSO device. Please see https://youtu.be/sJ19_qYPuyM

Is there any data available about the response time it takes teachers to lock their doors with keys vs using these devices?

At this time, there is no data for this information.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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BarracudaDoor Defense System

Product ID: 571950779

Details

Brand
Barracuda
Mounting Type
Door Mount
Material
Alloy Steel
Color
Black
Style
Modern
Finish Type
Powder Coated

€ 453.11

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Barracuda
Mounting Type
Door Mount
Material
Alloy Steel

Description

BarracudaDoor Defense System

Specifications

Brand	Barracuda
Mounting Type	Door Mount
Material	Alloy Steel
Color	Black
Style	Modern
Finish Type	Powder Coated
Number of Pieces	1
Manufacturer	The BILCO Company
UPC	783446070034
Part Number	35GK07
Item Weight	2 pounds
Package Dimensions	8.11 x 7.01 x 2.32 inches
Item model number	35GK07
Is Discontinued By Manufacturer	No
Finish	Powder Coated
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

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