Heavy Duty Tubular Knob Lock *One-piece knob, knob is removable for cylinder rekeying and replacing. *Material: Brass or stainless steel *Backset: adjustable 60mm-70mm *Door thickness: adjustable 35mm-50mm *Cylinder: 5-pin rekeyable cylinder, with brass key nickel plated, Schlage keyway available *Different finish available: PB, SB, AB, AC, SS, SP, CS, SC, CR, AD, 10B, PVD *Different functions available: bedroom, bathroom, passage.