Back up lights on when trans is in neutral

I just picked up a new switch at Advance Auto. BWD brand part# S9148 A cheaper looking unit compared to the factory one. The body of the switch has very little surface to put a wrench on it. I just installed it and it does work.
Just so everyone is clear. It is a normally open switch and when you put the trans in reverse the ball is pushed in and the switch is made turning the reverse lights.