What is the diameter of the hole I need to drill in the door to mount this?

the instructions indicate that you are to drill an inch and one quarter hole in the door.

Does one need to install the outside key entry component, or can it be used as an inside only night latch?

Yes, instructions are provided for both configurations, inside security latch, or deadbolt style operation. I used both configurations. Deadbolt for front door, and security latch for inside door to garage. If using as high security use be sure to use long screws, ones included not long enough to reach internal wall studs for added strength. Door frame itself not strong enough for high security.

Can this lock be used on either a left or a right hinged door?

Yes. I've mounted it both ways.

What the is minimum thickness of door this lock will work for?

The door thickness required is 1-3/8" to 1-3/4". So the minimum is 1-3/8".Thank you for your interest in our product.A. JonesTime Warp Toys and More

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Description

🔐 Lock in peace of mind with style and strength!

EFFORTLESS SETUP - Includes clear instructions and template for quick installation on wood or metal doors (1-3/8” to 2-3/8” thick).
PREMIUM DURABILITY - Constructed from diecast metal with a stylish brass finish for long-lasting protection and aesthetic appeal.
UNYIELDING SECURITY - Prohibits forced entry by spreading door frames with a tamper-resistant shutter guard.
COMPLETE LOCKING KIT - Comes with angled strike, rim cylinder, two unique keys, mounting plate, and fasteners for all-in-one security.
CUSTOM FIT FLEXIBILITY - Tailpiece can be trimmed for perfect fit, ensuring smooth lock performance on any compatible door.

The PRIME-LINEU 9970 Deadlock is a single-cylinder, jimmy-resistant deadbolt designed to prevent forced entry by spreading door frames. Made from durable diecast metal with a brass finish, it fits doors 1-3/8” to 2-3/8” thick and includes all necessary components for easy surface-mounted installation. Weather-resistant and tamper-proof, this lock offers professional-grade security with a sleek look, perfect for enhancing home safety without compromising style.

Specifications

Brand	PRIME-LINE
Special Feature	Weather Resistant
Lock Type	Deadbolt
Item dimensions L x W x H	1 x 4.31 x 2.87 inches
Material	Diecast metal
Recommended Uses For Product	Security
Style	Single Cylinder
Color	Brass
Number of Pieces	1
Finish Type	Brass
Included Components	Deadlock and fasteners
Controller Type	Ring
Shape	Round
Item Weight	1 Pounds
Control Method	Touch
UPC	049793099709
Model Name	Deadlock
Global Trade Identification Number	00049793099709
Manufacturer	Prime-Line Products (Home Improvement)
Part Number	U 9970
Item Weight	1 pounds
Product Dimensions	1 x 4.31 x 2.87 inches
Item model number	U 9970
Is Discontinued By Manufacturer	No
Size	1 Pack
Finish	Brass
Item Package Quantity	1
Special Features	Weather Resistant
Usage	specific_uses_for_product
Batteries Included?	No
Batteries Required?	No
Warranty Description	Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse.

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