How can you just buy a door of good guard against theft? Answer to choose the old brand with good reputation as far as possible when buying door of guard against theft, must ask for to agency " examine report " , consult carefully examine conclusion, distinguishing what the door of guard against theft of agency sell on commission installs is class A lock up or notice to examine the following item:

Certificate of approval: Door of right guard against theft must detect via legal the orgnaization detects according to the standard eligible, manufacturing company is in provincial Public Security Department (bureau) safe technology is on guard the safe technology that the branch extends is on guard the product produces evidence definitely.

Lock: Core part. Door of eligible guard against theft uses three azimuth lock commonly, not only door lock lock is decided, fluctuation rail can insert a lock to decide, face each other tries to secure. Inferior goods is not had commonly the lock was decided at 3 o'clock or free the lock decided a structure at 3 o'clock, and do not have function of guard against theft or often appear breakdown.

Craft quality: Should special attention is checked have without weld defects, such as opens solder, not the phenomenon such as solder, leakage solder, slag inclusion.

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