This thing is a brick,packed full of steel gears ,they look to be titanium nitride coated ,very high quality guts,i love it!

Where did you get it at and what tanks does it fit?

Is that one of the ETO transmissions?

I got this from dklm- rc its made to drive on a 550 size motor and turn on the smaller 480 size motor similiar to the tamiya leopard leopard transmission,ill have to get a clark tk24 board to make it worky

Nope, here's one of mine, Panther. Others are similar.