We use this as an additional layer for PCI Compliance. This helps to prevent people from plugging in their USB Flash Drive or their cell phone.We have 2 computers and sometimes the users don't know the difference and tend to plug their devices into the wrong computer. With this installed into the front USB ports they no longer plugin their devices to the wrong computer.This is a deterrent device and with enough effort you can pop it out with a tool.

I bought these with the blue key only to discover that I overlooked that the color of key only works with same color port blocker. I overlooked it but since these can be removed with tweezers (port Blocker not port Locker) it seems pointless. Now I have to buy another key. Maybe that's the point. I love the product but would love it even more if they were not so easy to remove with tweezers. It keeps people from plugging their phones into the PC but I don't know about data protection for the determined thief.

Les verrous reçus ne sont pas compatibles avec la clef Lindy blanche que j'avais déjà.J'avais pourtant pris soin de prendre de verrous de la même couleur que ma clef. Mais ça ne suffit pas. Alors ???Les verrous fournis avec la clef sont OK.

QUALITY OF THE PRODUCT IS VERY GOOD. INSTALLED AT SERVER COMPUTERS OF DISTRIBUTED CONTROL SYSTEM AT POWER GENERATING STATION TO REDUCE POSSIBILITY OF CYBER ATTACKS. EASY TO INSTALL AND SERVED OUR PURPOSE.

Great inexpensive way to lock down USB ports.