Premium deadlock with high-security features, perfect for hinged and sliding doors
The Lockwood 355-NMBK Deadlock offers advanced security with a lockable turn knob, concealed fixing, and resistance to wrench, jemmy, and hammer attacks. Its durable zinc body and stainless steel bolt ensure longevity, making it a reliable choice for homes and businesses alike.

Let’s explore its impressive features:
Features:
- Versatile Door Compatibility:
- Suitable for hinged and some sliding doors
- Enhanced Security:
- Lockable turn knob with an inbuilt clutching device to resist wrench attack
- Strong interlocking case and mounting plate to prevent jemmy and hammer attack
- Positive deadlocking action for added protection
- Durable & Concealed Design:
- Tested in accordance with AS4145.2-1993 security standards
- Concealed fixing for a clean and tamper-resistant installation
- Patented Mechanism:
- Protected by Australian and International Patents and Design Registrations
- Convenient Operation:
- Opened by key from outside and turn knob from inside when free
- Internal key locks or unlocks the turn knob
- Packaging Options:
- Available in either trade or display packaging
Invest in the Lockwood 355-NMBK Deadlock for superior protection, durability, and peace of mind.
Model No:
355-NMBK
EAN:
9340116117638
Body / Case Material:
Zinc
Bolt Material:
Stainless Steel
Residential Use:
Yes
Number of Cylinders:
2
Backset:
60mm
Warranty / Guarantee:
Lockwood 25YR Mechanical
Handing:
Reversible
Approved Standards Rating Level:
Lockset Security SL7
Corrosion Security C6
Durability D8
Bolt Holdback:
Yes
Kinetic Defence:
Yes