One blade edge, the Early Archaic Kirk culture knapper created some heavily serrate 'teeth'--but only on that right blade edge--or maybe they just used the Kirk Stemmed so much tha the serrations on the opposite blade edge simply broke in constant use--regardless, they're worn away. The piece came from a Muhlenburg--Christian County, Kentucky, collection. Length is 2&1/8" by 1&1/16", 5/16" max thickness up towards the tip (measured on a slight stack in the flint). Both faces of the base show channel flak thinning--not flutes, but the same principle, and being Kirk Culture there is very little to call basal grinding. The flint looks more like an Illinois Avon Chert than anything I can recall in Kentucky--probably has a specific chert-type name that I'm not familiar with--glossy, a high silicate flint. The reverse side has slight cortex and mineralization--100% guaranteed real. Shipping is $7.00 with checks or M.O>s welcomed. Sorry ,I use on electronic payment forms (like paypal)--Roy A.