1,Pull tight plastic seal, no tool required for installation. 2,Adjustable length plastic security seal, helpful for securing different types and sizes. 3,Metal clip not only provides greater locking strength but also increase the security. 4,The spikes at the back of the plastic seal provide better strapping grip on bags or other slippery objects. 5,Laser print offers the highest level of security as it cannot be removed or replaced without showing clear signs of tampering. And it resistant to oils greases and fuels. 6,Hot stamping print it is easy to read bcs of the contrasting color.