This case is for a PWM Fan controller but can be used with anything that can fit inside the case. There are a lot of different versions of hardware that do the same thing and they all seem to vary in size. I originally tried another case on here but it was way too short and I basically used the same model as a guide for this one. There is a support on top of the case that covers where the screws are located for clamping the wires. It is designed to break away cleanly but it does require a little bit of force to remove.