There are many different types and brands of bead crimp tools, but my favorite have always been the Beadalon brand.
There are three different sizes of Beadalon crimp tools that work with different size crimp beads and crimp tubes. Personally, I use the standard size crimp tool with just about any size crimp beads and tubes, but Beadalon recommends certain size crimp beads and tubes their different size crimp tools.
The standard crimp tool works with size #1 and #2 crimp beads and #2 crimp tubes.
The Mighty crimp tool works with size #3 crimp beads and #3 and #4 crimp tubes.
The Micro crimp tool works with size #0 crimp beads and #1 crimp tubes.