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Crowbar Test


Also called the Lever Attack or Jemmy Test, it is designed to simulate a burglar attempting to break into your home by using a lever such as a screwdriver to break open the lock or the hinge of your security door or window, or lever it from the wall. 

The Australian Standard requires a rotational force of up to 450N (100 pounds, or 45kg) to be applied and held for 20 seconds at all locking, hinging and fastening points around your security screen.

A large screwdriver is inserted at these points and mechanically rotated until either the force required or 80° rotation has been achieved. A security screen door must remain securely locked and a window security screen must remain securely fastened to the window that it is covering to achieve a pass.

The test panel fails if all the hinges, or all the locking points or all the fastening points (screws holding a window section onto the wall) fail, or if the edge of the security door or window has deflected to make a gap wider than 6 inches.

Crimsafe® products easily pass this Standard's test requirements, thanks to their specially engineered design. Our hinged security doors for example, are manufactured with mid-rails and triple-locks as a standard feature. A mid-rail greatly enhances a door's strength, and prevents the lever from damaging the lock to the extent that it breaks. A triple-locking system means added security too.

And our Safe-S-Cape emergency exit products feature a special "Triple Anti-Jemmy System" designed to foil any jemmy attack. A burglar must get through three physical barriers on the exterior of the Safe-S-Cape to get at the lock. It's incredibly secure from the oustide, while still giving you the ability to exit the house quickly in the event of an emergency.

To get a feel for the security of Crimsafe® products for yourself, enter your postcode above to contact a Crimsafe Licensee.