While there are many versions, common features found in these scripts include: Core Hack Features
Many "free" hacks are actually scams designed to steal your Roblox password or install viruses on your computer. Some download links use MediaFire or Pastebin and require a password to hide malicious files.
Exploiting violates Roblox's Terms of Use and can lead to your account being permanently deleted.
If you are looking to learn more about how DOORS works without cheating, there are many legitimate Roblox Studio tutorials on how to build your own interactive door systems.