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Deadbolts

Mul-T-Lock Hercular deadbolts for timber and metal doors.

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Who needs Mul-T-Lock Hercular deadbolts?

Mul-T-Lock Hercular deadbolts suit timber and metal doors that need real protection against forced entry. Mul-T-Lock describes the Hercular as the only Grade 1 deadbolt with an adjustable backset.

Frequently asked questions

The single cylinder model is keyed on the outside with a thumb turn on the inside. The double cylinder model is keyed on both sides, for doors that must be locked and unlocked by key from inside and out. The captive key model is the captive key version of the Hercular.

Yes. They can be keyed alike, keyed different, or placed on a master key system.

With the 3in1 key system you can re-key the lock on the spot, without changing the cylinder, if a key is lost or a combination needs to change.

Need a new key for your Mul-T-Lock Hercular deadbolts?

We are an authorised Mul-T-Lock distributor, we can support your restricted keys or master key systems.

The Mul-T-Lock name, the muscleman logo, in the field of locking products, the MTL name, and any other name, mark, or logo used by Mul-T-Lock and marked by a ™ or ® sign, are registered / pending or otherwise owned trademarks of Mul-T-Lock Ltd. and/or its affiliates 2026 © ASSA ABLOY

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