The Practer pen is a revolutionary multi-function tool that is perfect for the engineer on-the-go. This 6-in-1 pen does it all and more. Not only can you write with it, but you can also use it as a keyholder, a stylus, a PSI checker, a level meter, a screwdriver, and a ruler. It’s the perfect tool to keep in your pocket or on your keychain so you always have the right tool for the job. The Practer pen is designed with the engineer in mind, with its sturdy construction and its lightweight design. It’s perfect for the anyone who has to get the job done quickly and efficiently. It’s also great for the DIYer who needs to make quick adjustments or repairs. The Practer pen is the perfect tool for any engineer or DIYer looking for a reliable, multi-function tool.