A video showing the EAB Key in use is now up on our YouTube channel. Check out how easy it is survey for trees affected by the emerald ash borer. https://www.youtube.com/watch?v=3hS38FDMEuM This works because there are no other species of wood-boring beetles in north-eastern USA and south-eastern Canada with precisely the same size and shape of exit wound. If the key fits snugly, it was EAB.