i just uploaded my resent work in making these tools. The ax is rhyolite with rawhide binding. The adz are done with different bindings to see how the compair in usage. Spruce root was not the best but my bindind with it was not all that well done. Rawhide came in at second place and sinew cordage being on the top. Last was my second celt and stands it's own ground. The adz are in quartzite with two in greenstone. The celt not sure of the rock type but was used extensively in Pennsylvania.