For timber doors hinged on the left or right, requiring a single action escape function on the inside. Also suitable for steel & composite doors - special fixings required. Hand must be stated on order. Deadbolt can be locked for additional security. Deadbolt locked or unlocked by euro profile cylinder from outside or by cylinder key or turn from inside. Latch bolt withdrawn by cylinder key from outside or by lever handle from inside. Latch bolt automatically locks when door is closed. Deadbolt and latch bolt withdrawn simultaneously by inside lever handle. NB: Lever handle must NOT be used on outside - only fixed pull or separate pull handle.