This plastic label provides security and uniqueness. Each plastic label seal is printed with a different serial number for secure id tracking, progressive numbering, no duplication, never fade. Logo, text, barcode, qr code, etc. Can be customized for printing. The sign security tag has a self-locking function and can be locked by pulling it tightly without any tools. Single use, once locked it cannot be opened. Remove with a steel knife. The pulling force to break the safety seal is up to 25kg. Stainless steel spring locking mechanism provides maximum tamper-proof security. High density polypropylene, more durable. Waterproof and weatherproof. Essential for labeling products in a variety of retail stores and factories