Many people have standard cylinders on their doors at home, but these are not the most secure locks available. To secure your doors properly, you need the Eurospec MPX6 Euro Cylinder & Turn. To lock the door on the inside, simply use the turn knob - there\'s no need for a key.   Anti-attack Features This cylinder has a variety of anti-attack features in place to help secure your home: hardened steel anti-drill pins, plugs and disc snap-off front section (sacrificial cut) anti-plug pull feature special anti-pick pins unique anti-bump feature TS 007:2012 Security Standard Th...