anti-theft mortise lock cylinder:
1. 75mm S.C, with double line pin tumblers,brass thumb knob
2. key with serpentine groove, 3-7pcs keys as you wish anti-theft, anti-drill & tamper-resistant 3. finish: PB , SN, AB,AC,RG,PC, ORB, etc. available 4. European standard sizes, other sizes are optional 5. package: white box, 50pcs/ctn