NTW RJ45 Port Blocker & Dust Cover, Network Port Lock, Ethernet Port Protector, LAN Cable Lock, Secure RJ45 Connector with Color Coded Keys, TAA Compliant, 50 Locks

I got lucky and found a warehouse deal for a 50 pack of these ($19.79, Used-Like New) - not sure if I would have paid the full $75 for a 50 pack. With that said, they get the job done and they do it well. They snap into place VERY securely and there is no removing these things unless you have the key. I have these on my home server rack to primarily keep dust out, they also don’t look half bad. Keeps everything uniform. I could see these being extremely useful in a business or school environment where you need to block those ports out for security reasons. Obviously you could just disable the port in software, but having that extra layer of security definitely doesn’t hurt. I’ve seen some bad reviews where people complain they can’t remove the blocker from the key… just pull it off of the key and you’re good to go. The keys are different for each color, which is also beneficial. Very happy with my set. I did go ahead and take the plunge for another 10-pack at the MSRP to get those last few ports blocked.

Works well but a little expensive for plastic.

These are exactly as described. They sit securely in the port. They keep dust out. Only concern is losing the key. Great pick-up.

These are great and very sleek. Works great!!

One thing that bothered me immediately was the packaging. Having so many of these and no place to store them is quite annoying. It would've been amazing if they came in a resealable bag. As others have stated, not being able to buy spare keys is annoying. I'm not to the stage where this is an issue for me yet, but having to buy a whole new set just for more keys is not something I'll enjoy later down the road. Overall, although these do a great job at "locking" ports form unattended access, and keeps them clean from dust (better than leaving them completely open), I don't think they're worth such a price. Spending almost $1 per port is ridiculous, knowing they are probably worth 5 cents of material to make. I would've bought more than I did if they didn't cost so much and have some issues (buying extra keys specifically). If you need a lot of these, you're better off buying a 3D printer and making your own. You'll spend around the same amount, and get more out of the money long term. Plus, you can make more keys if yours get worn down too badly. Let's be honest, the better approach is having smart switches and disabling the ports on that to revoke unauthorized access. From there, you could use a blank RJ45 cap to cover the port from dust. All these will do is provide a visual representation to other people and say "This port is unusable by anyone." I'm giving 3 stars because they get the job done as described, but took two away from the high price, packaging, and no ability to buy keys separately for a lower price.

I bought 3 different colour packs to differentiate general distribution laptops that are the same model, but need to be stored in different areas of our school buildings. They are working really well. Now it's easy to see where laptops need to be returned by their colour code... Yellow... Grade 3 Green... Grade 4 Red... Design Lab Before the port locks we used stickers, but stickers would either fall off or get peeled off. The port locks are highly visible and practically fail-proof. All parties, myself included, are pleased with the purchase.

When you use the key to remove - it gets stuck. It's not intended to be a one time use plug - but essentially it is. I tried wiggling, jiggling, pliers, knife. It's just a poor design - especially for the price. Look elsewhere.

A little expensive - but does the trick.