If you're tired of paying ridiculous fees for replacement access cards, these T5577 RFID cards are a game-changer. I've been using them to clone my office and gym access cards, and they've saved me hundreds already.

The thick 1.8mm PVC construction makes these feel premium - way more durable than those flimsy cards my office issues. No more bent or cracked cards after a month in my wallet!

Programming them does require the right equipment (I use a Flipper Zero), but once you get the hang of it, copying takes literally seconds. The blank T5577 chips work perfectly with most 125kHz systems - I've successfully cloned EM4100 and HID formats.

Where these really shine is cost savings. My apartment charges $50 per replacement card - with this 12-pack costing less than two replacements, it's a no-brainer. I've made spares for my keychain, wallet, and even gave some to roommates.

The only downside is they don't come pre-programmed (which is actually better for security). You'll need compatible writing equipment, but once you have that setup, these blank slates become incredibly versatile cloning tools.

After six months of daily use, all my cloned cards still work flawlessly. For anyone managing multiple access systems or just wanting affordable backups, these T5577 cards deliver exceptional value.