Review on Ryobi ZRP421 Cordless Angle Grinder: Unleash Cutting Precision and Portability by Isaac Maze

I have used this with a large 10" cutting wheel to cut copper pipe. It does a great job, especially with pipes that have water in them. . Much safer than a plug in model with all that water! she is slower What takes 30 seconds with the plug-in part takes 60 seconds with this one. But the convenience of not having to search for an outlet and run an extension cord is worth the extra run time!