Tubular knob door lock, 1)Material:steel 2)Function:ET BK PS DM 3) ... )Door thickness:fits door 35mm to 50mm2)Backset:adjustable 60mm and 70mm3)Material:iron,stainless steel,brass4)Function:entry,privacy,passage ... brass,satin stainless steel,black nickel6)Productivity:100000pcs/month Knob lock 608