Lockwood 538 Series Commercial Grade Storeroom Escape Knobset, Tulip Knob.
- Outside knob always rigid, key retracts the latch.
- Inside opened by knob at all times.
- Satin chrome finish
- Compatible with most restricted keying systems
- 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