19th December is the last date to order for delivery before Christmas, any orders after this date will be delivered 5th January
NEXT DAY DELIVERY ON ORDERS PLACED BEFORE 2PM


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Weather Resistant

Manufacturer Guarantee
The Ingersoll Impregnable 10 Lever Padlock is one of the longest-standing and most respected high-security padlocks ever made. First introduced in 1971 and still produced in England today, it uses traditional engineering methods and a robust 10-lever locking mechanism, far exceeding the security of typical lever padlocks.
Unlike most modern designs that rely on pin tumblers or disc cylinders, the Impregnable uses a complex multi-lever internal system that is exceptionally difficult to pick. Combined with its hardened steel construction, anti-drill bar and sliding keyway cover, it remains one of the toughest padlocks available.
This open-shackle version offers broader compatibility while still providing a high level of protection against cutting, pulling and drilling. Its reputation is further reinforced by decades of use in demanding applications, including official NATO military inventory.
Each lock is supplied with three keys, though key duplication is limited as blanks are not commonly stocked, adding an extra layer of security. Available in both keyed alike and keyed different formats.
Hardened steel body
Hardened steel open shackle
10-lever locking mechanism
Z-shaped anti-drill bar
Sliding keyway cover
Nickel-chrome-plated exterior
Supplied with 3 keys
Available keyed alike or keyed different
Traditional heavy-duty Ingersoll construction
Manufactured in England
Industrial plant rooms
Secure storage buildings
Commercial gates and access points
Government and military security
High-risk doors, cabinets and fixtures
Sites requiring long-term reliable locking
| Brand | Intersoll |
| Material | Hardened Steel |
| Weatherproof Rating | Outdoor |
| Insurance Rated? | No |
| Size | Code | Weight | Measurements |
|---|---|---|---|
| Keyed Different |
OS711 |
950 g |
Width: 60mm Height: 90mm Depth: 25mm Shackle Diameter: 10mm Vertical Shackle Clearance: 30mm Horizontal Shackle Clearance: 30mm |
| Keyed Alike |
OS711 KA 233s950 |
950 g |
Width: 60mm Height: 90mm Depth: 25mm Shackle Diameter: 10mm Vertical Shackle Clearance: 30mm Horizontal Shackle Clearance: 30mm |
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Discover the easiest way to purchase padlocks for your organisation.
Apply HereKeyed Alike
Keyed alike padlocks all have the same key.
Keyed Different
Each padlock has it's own unique key.
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