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The Prime-Line U 9972 is a robust double cylinder deadlock crafted from diecast and steel with a corrosion-resistant brass finish. Engineered for hinged entry doors 1-3/8 to 2-3/8 inches thick, it features a jimmy-resistant mechanism that prevents forced entry by door frame spreading. This surface-mounted lock includes an angled strike, two keys, a tamper-resistant shutter guard, and all necessary hardware for easy installation, making it an ideal security upgrade for professional and residential settings.




























| Additional Features | Scratch-Resistant |
| Asin | B000BD8ISW |
| Best Sellers Rank | #144,299 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #492 in Deadbolts |
| Brand Name | PRIME-LINE |
| Color | Brass |
| Controller Type | Ring |
| Customer Reviews | 4.2 4.2 out of 5 stars (515) 4.2 out of 5 stars |
| Finish Types | Brass |
| Global Trade Identification Number | 00049793099723 |
| Included Components | Deadlock, keeper, 2 keys and fasteners |
| Item Dimensions | 1 x 4.31 x 2.87 inches |
| Item Type Name | Prime-Line U 9972 Jimmy-Resistant Deadlock, Diecast, Brass Color, Angle Strike, Double Cylinder (Single Pack) |
| Item Weight | 0.27 g |
| Lock Type | Key Lock |
| Manufacturer | Prime-Line Products (Home Improvement) |
| Manufacturer Part Number | U 9972 |
| Manufacturer 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. |
| Material Type | Diecast |
| Model Name | Jimmy-Resistant Deadlock, Diecast, Brass Color, Angle Strike, Double Cylinder |
| Model Number | U 9972 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Number Of Pieces | 1 |
| Recommended Uses For Product | Securing hinged entry doors and preventing forced entry on doors from 1-3/8 in. to 2-3/8 in. thick |
| Shape | D Shape |
| Style Name | Double Cylinder |
| Unit Count | 1 Count |
| Upc | 049793099723 |
User
Solid Look, Easy To Install
Very solid easy to install lock. Heavy duty this was easy to install, it fit the doorframe perfectly and it functions as it should. Great lock, great price!
User
Good but better suited for utility room than front door
Replaced one just like it that was at least 15 year old. Using it on a very old and lightweight door that‘s too thin to take a deadbolt assembly. This is a reliably built, jimmy-proof surface lock. I don’t believe it’s as stout as a deadbolt. But it does a fine job on a door that anyone could easily blow through regardless of which lock was on the door. Probably better suited for a utility room than the front door of your house.
User
Bueno
Bueno
User
Fist Exactly Where the Old Lock Was
My Dad installed this lock at least 20 years ago. It finally quit working. The cylinder would turn but the locking mechanism would not engage. It was not available locally at the 3 places I checked so I went to Amazon to get it. It is just like the old one and fits exactly. This made it easy for me to install with no problems. The door is 70 years old. If this new lock quits working, I will probably have to replace the door instead of the lock. Glad I found it on Amazon, and really glad the style has not changed since my Dad bought the first one. Recommend it for durability and safety. If you are installing it on a door that has never had a lock like this, it will be more complicated. I am not that skilled. The instruction are very clear and explain how to do it, and templates are included.
User
If you've got an old one of these on your house door, the replacement is way easier than you think!
I recently needed, on a very short time fuse, to replace this kind of lock on an outside door to my house. The old lock must have been at least 40 years old. To my very pleasant surprise, exactly the same kind of lock was readily available on the Amazon website. Had exactly the same mechanism, dimensions (including mounting screw holes), and door frame pieces. I had to work to remove the mounting screws for the old lock, but installing the new lock was a very simple task after that -- no new drilling! Had to replace all of the old keys. But otherwise this was a WOW!
User
Unhappy
Horrible, I bought this to replace one I bought 3 years ago and my old key works it. No security
User
Excelente
Excelente
User
Okay fit
I purchased this lock because it was the exact same one I have on my front door wellllll there was a lot of shimming and hole drilling I had to do. Isn't the exact same at all just be aware. Seems to be working okay though
User
Good solid lock
Good solid lock, easy to understand instructions.
User
Ca fait le job
acheter pour verrouiller une porte coulissante de grange. ca fait le job
User
Excellent remplacement
Porte de bois sécurité
User
Déçu
Je ne.pensais pas que c'était si fragile. La partie en équerre s'est cassée en deux , je suis déçu de ce produit.
User
Produto resistente
Ótimo produto.
Trustpilot
5 days ago
2 months ago