On the surface this looks like a fairly basic Freehand Zero. But it is in fact modified. The body has been finished with a fine grit abrasive... Enough to break the shine, which makes the surface much smoother to the touch and easier for strings to slide by. Also, if you look inside, UNDER the sticker, a groove was machined for flowable silicone or response ring. Hidden by the sticker, which shows how flexible response could be made on a Freehand Zero.