I used this in a Makita 4-1/2 inch angle grinder model GA4530, fits perfectly. It will also fit a Milwaukee 6146-30 4-1/2" angle grinder if you are in a bind and have the correct wire connections. Note that these two models do not have a ground wire but are double insulated. On the Makita it was much easier to change the wire, the milwaukee had the wires twisted in tight places and i had to add some wire connectors to the ends of the wires to secure with screws both of which can be repaired by someone with little electrical experience just do it a photo with your phone or whatever to make sure you put it together correctly.Especially the connection of wires.The wires must return in exactly the same way or you won't be able to close the handle.