CONTROLTEK - CNK585087 Providing a perfect balance of security and ease of use, SafeLOK Tamper-Evident Deposit Bags are ideal for retail applications where quick training of new employees is important. Patented security features alert to attempted theft while Press2Lok technology makes using the bag easy for your associates. Press2Lok closure is simple press to seal. High-visibility void message alerts you to tampering with cold or chemicals. Special thermochromic ink on the high-performance film turns red when subjected to heat. Random, printed line graphics prevent cut-and-replace tampering. Anti-static liner does not cling to hands and clothes, speeding up processing. Large serial numbers and bar codes allow easy tracking via CCTV. Security border and micro printing prevent cutting and resealing. Each bag includes a serial number and tear-off receipt.