What are the security door lock core levels? Which lock is better for the security door?
The door lock cores used in the market are basically divided into three levels, namely, Class A, Class B, and Class B (also known as Class C). According to the "National Machinery Lock Standard", the lock core has two levels, A and B. The super B level is an enhanced version of the B grade developed by the entrepreneur. Different levels of anti-theft door lock cores have obvious differences in the anti-theft effect. Let's take a look at the comparison of these three lock cylinders to select the most suitable home security door lock cylinder.