If it was made by any of the companies who made the Shopsmith's over the years it will look like the ones in the two pictures below. The first picture is the older ones and can use the "old" style knives. The one in the second picture is the current Molder Head.
There are Molder Heads from other manufacturers that can fit on the Shopsmith but use their own knives for them. If the one you bought does not match any of the ones pictured than you will need knives from it's manufacturer.
