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Slave-leaf locks are installed where extra-wide leaf doors can’t be used.  For normal traffic, only the main section of the door is used, with the slave-leaf unlocked only when a wider aperture is required.  However, this presents a weak point in a door’s security and is vulnerable to abuse, which can damage the small leaf.


Because of this, our slave-leaf Rhino locks offers a robust solution.

Rhino bolt PR-6304-RB-RK-LL

Designed for the most extreme environments, the Rhino Bolt’s extended mortice lock bolt secures the slave-leaf to the door frame.  It also lowers the keyway and brings it within reach.  Steel deadbolts, high-impact strike plates, bolt-through reinforcing plates and anti-tamper fixings are also used.

Plus the 3mm reinforcing plates and back-to-back fixings provides higher impact protection to protect the lock mechanism.

Junior rhino PR-6308-BR-LL

When securing slave-leaf doors is a priority over impact resistance, the Junior Rhino is suitable.  

The mortice lock is located at the top or bottom edge – or both – and locks the slave-leaf to the floor or door frame.  Plus no specialist equipment required is to install, making it convenient to retrofit onsite.


  • Lifeline closed keyways to minimise tampering
  • One-key access, reducing keys carried on ward
  • Release slave-leaf with a quarter turn
  • Anti-tamper fittings
  • Easy-clean floor sockets available

Learn about intuitive one-key access


Glasgow office

Level 4, Skypark 3
14 Elliot Place
G3 8EP

t: 0330 058 0988

Blackpool office 

Unit 8 Bankfield House
250 Bristol Avenue

e: info@safehingeprimera.com


© Safehinge Primera 2018.  Design By Submarine. Development By Crocodiles
Safehinge Primera is a trading name of Safehinge Limited (SC304496) and Primera Limited (03708136)