# Prime-Line U 9970 Single-Cylinder Deadlock, Brass-Colour Diecast

Prime-Line U 9970 is a surface-mounted, single-cylinder deadlock with a brass-colour diecast finish and an angled strike. The listing describes a jimmy-resistant design and states it fits wood or metal doors 1-3/8” to 2-3/8” thick, subject to checking the required door measurements.

- [Original product page](https://bargainpostbox.co.uk/product/prime-line-u-9970-single-cylinder-deadlock)
- [View offer](https://bargainpostbox.co.uk/visit/prime-line-u-9970-single-cylinder-deadlock)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Prime-Line
- Model: Jimmy-Resistant Deadlock, Diecast, Brass Color, Angle Strike, Single Cylinder
- Category: Tools & Garden > Hardware & Building Materials
- Price: 24.30 GBP
- Previous price: 29.87 GBP
- Discount: 19%
- Price checked: 2026-11-14T09:53:29.957Z
- Rating: 4.5 / 5
- Reviews: 1026

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Surface-mounted cross-bolt deadlock with an angled strike and tamper-resistant shutter guard, as described by the listing.
- The listing states compatibility with wood or metal doors 1-3/8” to 2-3/8” thick and installation on either left- or right-hinged doors, inside or outside.
- Requires a 1-1/4” hole and uses a Segal keyway.

## Pros

- The listed kit includes the strike, rim cylinder, two keys, mounting plate, fasteners and shutter guard.
- The stated door-thickness range and left- or right-hinged installation give flexibility for suitable doors.
- Customer feedback reports easy installation and positive experiences with compatibility and functionality.

## Cons

- Customer feedback includes reports of breakage within weeks and criticism of cheap-feeling construction and flimsy screws.
- Feedback on key operation and fit is mixed, so compatibility and smooth operation may not be consistent for every installation.

## Specifications

### Identity
- Brand: Prime-Line
- Model: Jimmy-Resistant Deadlock, Diecast, Brass Color, Angle Strike, Single Cylinder
- Lock type: Key Lock
- Style: Single Cylinder
- Colour: Brass
### Controls
- Control method listed: Touch
### Dimensions and installation
- Form factor: D-Shaped
- Dimensions listed: 25 x 109 x 73 millimetres
- Weight listed: 1 Pounds
### Materials and finish
- Material listed: Diecast
- Finish: Polished

## Before you buy

- Measure the door backset, cross bore and thickness before purchase. The listing also says the lock requires a 1-1/4” hole, and the tailpiece may need shortening if it is too long for the door.

## In the box

- Angled strike (Included)
- Rim cylinder (Included)
- Two keys (Included): The listing says the keys are keyed differently.
- Cylindrical trim ring (Included)
- Fasteners (Included)
- Mounting plate (Included)
- Installation instructions (Included)
- Tamper-resistant shutter guard (Included)

## A good fit for

- Buyers seeking a surface-mounted, key-operated deadlock for a door within the stated thickness range.
- Installations where a brass-colour finish, angled strike and included shutter guard are desired.

## Less suited to

- Doors outside the stated thickness range or installations that cannot accommodate the required hole and measurements.
- Buyers who need a mortice lock or a separately documented security certification, neither of which is established by this listing.

## Customer feedback

Customer feedback highlights easy installation and positive experiences with compatibility and functionality, which may matter for a surface-mounted lock fitted to a suitable door. However, reports on durability, key operation and fit are mixed, and some feedback criticises build quality and screws. Treat the stated fit range as a starting point and check the door dimensions carefully. The overall ratings lean positive, but ratings alone do not establish long-term reliability.
- Positive themes: Customers report that installation is easy.
- Positive themes: Feedback includes positive views of compatibility and functionality.
- Negative themes: Some customers report breakage within weeks and criticise the build quality and screws.
- Mixed feedback: Durability, key operation and fit receive mixed feedback.

## Frequently asked questions

### What door thickness does the listing specify?
It states a range of 1-3/8” to 2-3/8” for wood or metal doors. Measure the door and check the other required dimensions before buying.
### What hole and keyway does it require?
The listing specifies a 1-1/4” hole and a Segal keyway.
### Can it be fitted to either hand of door?
The listing says it can be installed on left- or right-hinged doors, inside or outside, provided the door and measurements are suitable.
### Does the package include keys and installation parts?
The stated contents include two keys, an angled strike, rim cylinder, trim ring, fasteners, mounting plate, instructions and a tamper-resistant shutter guard.

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## Images

![Prime-Line U 9970 Single-Cylinder Deadlock, Brass-Colour Diecast — 1](https://bargainpostbox.co.uk/i/wxTjcwbGnK-C_DXQTNTYPbikTPg5uVoNiewVmWuGRZaMWyiuz6sgZfc20aJ0v11rQf0wLLRuUaY0ohlogwAKUbHcdoMR_RmRPpdSOPIGQAke8iMv4zsKFfLo.jpg)

![Prime-Line U 9970 Single-Cylinder Deadlock, Brass-Colour Diecast — 2](https://bargainpostbox.co.uk/i/YaD9H9_j2KjLHSGzDFwL4J-huVpk95S8_7udRDXpPYVagxRs7j5aJwenke6SDjhAOWPq7BwFwdFRHIoDWUJRxW0yckhj_YPwMwLYSibDv80NhkTGnbIe2RBe.jpg)

![Prime-Line U 9970 Single-Cylinder Deadlock, Brass-Colour Diecast — 3](https://bargainpostbox.co.uk/i/pq2ZwUt4S_SLg--xL0plkilP2VSw8lfVmqdxFa6gSmeVmMChFgOJx6mVQfYqWXU-s6YVi0MbrSd69NjaN7v62T_kVsMQxzOeUVjnyxrH7fCLu36X4UZb_pBV.jpg)