Kali Linux Tools is a suite of software that can either be installed in Ubuntu manually from the Kali Linux page or with the Katoolin script. Questions that are about the Kali Linux distribution and not about Ubuntu are off-topic here. Please ask them at Unix & Linux Q&A.
Kali Linux contains a large amount of penetration testing tools from various different niches of the security and forensics fields. Many of these can be installed and used on Ubuntu.
Kali Linux Tools is a suite of software that can either be installed manually from the Kali Linux page or with the Katoolin3 script. Installing and using Kali Linux Tools on Ubuntu is largely unsupported, can break your system and will require some knowledge of the end user.