Lockwood 531 series commercial grade, passage knobset, tulip knob.                                                                          

Entrance Function

• Opened by knob either side at all times.

Additional Information

• Satin chrome finish
• 60mm backset standard
• 70mm and 127mm latches available separately
• Suit door thickness 32-48mm
• Brass latch bolt with 13mm projection
• Knobs and roses made of high purity zinc alloy
• Fire rated up to 2 hours