Combination Lock *Double Security ! *This kind of lock is combined by two pieces of lock. *One piece of deadbolt lock, and one piece of tubular / cylindrical knob lock. **Deadbolt lock: single cylinder or double cylinder available. computer key and normal key available. **Knob lock: tubular or cylindrical knob lock available. *Material: Brass or Stainless steel *Backset: adjustable 60mm-70mm *Door thickness: adjustable 35mm-50mm *Cylinder: 5-pin cylinder, Kwikset and Yale keyway available. *Different finish available: PB, SB, AB, AC, SS, SP, CS, SC, CR, AD, 10B, PVD *Function: entrance.