ISO9001:2000 Certificate Model No:5874-A/C Door Knob,Tubular Lock,Security Lock Door Knob,Tubular Lock,Security Lock1. Cylinder : Brass/Zinc/Iron2. Key: 3 keys brass/iron3. Backet : Available 60/70mm4. Door thickness : 35-50mm5.ISO9001:2000 Certificate & CE (EN817) Cerficiate Door Knob(Tubular Lock,Security Lock )(5874-A/C)