Lockwood Symmetry Single Cylinder Deadbolt & Turn Knob 7106PBDP Single Cylinder Deadlock ability to lock or unlock the door from the inside of the house with a thumb-turn provides a level of ease to which the modern homeowner has grown used. Single Cylinder Deadlock Function - On the outside, there is a keyed cylinder, while on the inside, the door is locked and unlocked with a thumb turn. In the event of an emergency, the inside thumb turn provides for a quick departure. Features: General purpose single cylinder deadbolt Operated by key from outside and turn knob inside Suits left or right-hand opening doors Hardened insert in locking bolt Cylinder The one-cylinder assembly solution “OneCyl” has been designed for the Lockwood Symmetry Range, which grants the convenience of cylinder interchangeability 5-pin Lockwood C4 brass cylinder assembly (6-pin compatible) Specifications: Door Thickness: 31mm - 45mm Residential: Yes Adjustable Backset: Yes Compatible with Restricted Keying: Yes Body / Case Material: Zinc Number of Cylinders: 1 Bolt / Latch Projection: 25mm Fixing Type: Visible Rose Design: Round Kinetic Defence: Yes Backset: 60-70mm Bolt Holdback: Yes Handing: Reversible Finish: Polished Brass