Inward Opening Handwheel Lock Core (70/30T) The manufacturer tells you what lock core is good for the security door. Many people need to replace the lock core of the security door for various reasons, but many people don’t know how to do it. Today Inward Opening Handwheel Lock Core (70/30T) manufacturers want to explain this issue to you.

What lock core is good for anti-theft door?
1. A-level lock cylinder, with a technical opening time of less than 1. The manufacturer of Inward Opening Handwheel Lock Core (70/30T) tells you that the Class A lock core is an old-fashioned lock core. The key is a cross flat or crescent key with a convex keyway. One or both sides have a row of concave keyways. This kind of key can be opened by a thief in a few seconds with tin foil. If you still use this kind of key at home, quickly change it. The A-level lock cylinder can no longer deter thieves.
2. Class B lock cylinder, with technical opening time within 5 hours. The Inward Opening Handwheel Lock Core (70/30T) manufacturer tells you that the B-level lock core key is flat or crescent-shaped, and the B-level lock key is more complicated than the A-level key. The key slot is single-sided or double-sided with two rows of concave or Cylindrical multi-point concave key hole.
3. The super B-class lock cylinder cannot be opened technically or the technical opening time exceeds 270. It is also called a C-level lock cylinder, which means that the security exceeds the B-level. The manufacturer of Inward Opening Handwheel Lock Core (70/30T) tells you that the super B-class lock core key is flat, the key slot is single or double with two rows of concave and S-shaped, or internal and external double snake-shaped internal milling groove structure. The manufacturer of Inward Opening Handwheel Lock Core (70/30T) tells you that it is the most complicated lock core and also the safest lock core. The tool opening time is more than 270 minutes, and it cannot even be opened. Now use the lock cylinder to use the super B-class lock cylinder.