BEST PRICE- GREAT HIGH SECURITY PADLOCK Includes 3 interactive keys and key card (it is required to have for key duplication) MUL-T-LOCK 13 C-Series high security padlock 13mm 1/2" removable shackle Mul-T-Lock& Interactive+ mechanical platform addresses High Security concerns while responding to functional needs. Building on four decades of extensive experience and the Interactive key platform proven technology and global success, Interactive+ utilize patented technology for enhanced High Security.