Two-keyed anti-destructive clutch lock core

A lock core to be placed in any lock and reduces the risk of being opened illegally through picking, smashing or other destructive unlocking methods comprising:

• two keyholes that separate the unlocking (insert the key) and the opening procedures (rotate the key);
• a plug rotatable by said secondary key and a plug sleeve locks or unlocks said lock core;
• a group of horizontally movable discs placed parallel to each other inside said lock core;
• a cylinder shaped sidebar placed beside said discs and can be pushed into said left slots when said discs are aligned by said primary key;
• two horizontally movable driver pins placed inside two passages on the left and perpendicular to said sidebar;
• two anti-picking slots placed inside said protective panel preventing the lock from being picked;
• a relatively thick (more than 4 mm) protective panel featuring four different shapes:
• the ellipse, circular, rectangular and two crossed circles for meeting the requirement in different environments;
• and
• a pair of keys comprises a primary key and a secondary key.