Tamper-evident fasteners designed to securely seal bags, containers, and other items. The flexible strap features a series of small beads that lock into a one-way locking head, allowing the tie to be tightened easily while preventing it from being loosened or reopened without cutting. Made from durable plastic, they provide a quick, reliable way to secure shipments, cash bags, evidence bags, and other sensitive materials while clearly indicating if tampering has occurred.