DIGI LOCK WITH LEVER HANDLES Satin Chrome Non Handed Design. Clutch mechanism on Lever, to Prevent Damage to internal parts. Suitable for Doors 35mm to 65mm Thick. 60mm Backset Deadlocking Latch. Successfully Fire Tested to EN 1637 (For use on Timber Fire Doors up to 1 hour). Suitable for External Use (240 hr Salt Spray test to EN 1670). Compact & Robust Zinc Die Cast Body. Supplied with Black Neoprene Seals.