Thanks, Cliff.
I designed it right after I bought it in Az. It came with a long flex cable that would not fit on this Dremel but the cable fit the one I have there so it stayed there. the reason it did not fit is because this unit has a ring magnet on the arbor just under the end cap and that  lights the LED when it is turning.

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day