Jimmy-Resistant Deadlock U 9972 - Secure Brass Finish Deadbolt

In this review of the Jimmy-Resistant Deadlock U 9972 the bottom line is simple: this is a practical, surface-mounted double cylinder deadlock for homeowners or renters who want an added layer of security on hinged entry doors. The reviewer found it best for installations where preventing forced entry by prying or spreading the door is the priority, and its jimmy-resistant cross-bolt design combined with a brass plated, diecast construction offers clear deterrence. Installation is straightforward with basic tools, and the package includes the cylinder, angled strike, 2 keys and mounting hardware so the lock is ready to fit a 1-3/8 in. to 2-3/8 in. thick door.

Key Features

• Diecast construction: Durable diecast and steel components provide a solid feel and resistance to everyday wear when mounted correctly.
• Jimmy-resistant cross-bolt: The locking mechanism resists spreading of the door from the frame, helping prevent forced entry attempts.
• Brass plated finish: A corrosion-resistant brass colored plating keeps the lock looking neat on entry doors while resisting surface rust.
• Double cylinder design: Requires key on both sides which increases security for doors with adjacent glass or sidelights.
• Complete hardware kit: Ships with an angled strike, rim cylinder, 2 keys, trim ring, fasteners, mounting plate and tamper shutter guard for an out-of-box install.
• Fits common door thicknesses: Designed for wood or metal doors from 1-3/8 in. to 2-3/8 in. thick, covering most residential doors.

Who It's For

This deadlock is best for homeowners, landlords and property managers who need a surface-mounted cross-bolt solution to reinforce hinged entry doors, particularly where extra resistance to jimmying is desired. It is a good option for secondary locks or for doors with vulnerable frames where spreading has been a concern.

Those who should look elsewhere include buyers who need a keyed-alike option without a manufacturer special order or purchasers who require a single-cylinder thumb-turn on the inside; this model is a double cylinder and is keyed differently unless specially ordered keyed alike.

Pros & Cons

Pros

• Sturdy diecast and steel build gives a solid, secure feel.
• Effective jimmy-resistant cross-bolt design that deters forced entry.
• Easy installation with included hardware and clear instructions.
• Attractive brass plated finish that resists corrosion.

Cons

• Some users reported a stiff key turn initially and a few durability complaints under heavy use.
• Double cylinder operation requires a key to operate from both sides, which may not suit all users.

Specifications

Our Verdict

The U 9972 jimmy-resistant deadlock is a sensible, cost-effective reinforcement for hinged entry doors where preventing forced entry is the priority. It provides solid construction, a corrosion-resistant brass look, and an inclusive hardware kit that makes installation straightforward; buyers who want a simple, secure cross-bolt lock will find good value here, though those needing a single-cylinder thumb-turn or immediate keyed-alike service should confirm options before purchase.

Frequently Asked Questions

Can this deadlock be used on metal doors?
Yes, it is designed to mount on wood or metal doors from 1-3/8 in. to 2-3/8 in. thick.

Does it come with keys and all hardware?
Yes, the package includes 2 keys, an angled strike, a rim cylinder, mounting plate, fasteners, trim ring and a tamper-resistant shutter guard.

Is it keyed alike by default?
No, units are keyed differently by default; keyed-alike versions are available only by special order from the manufacturer.