Robust anti-theft security locking system for trucks, semi-trailers, refrigerators, isothermals or closed boxes for transport, with double doors and double latches. It does not require any type of assembly or installation. Made of AISI-304 standard stainless steel, the Its finish is electro-polished steel, the locking cylinder consists of an anti-drill central axis. Minimum dimension: 235 mm. Maximum dimension: 305 mm. Weight: 127 kgs.