These 4 blanks are free to whomever wants to try them. These have been sitting in my toolbox awhile and I'm ready to give up this idea. These are super hard pieces of quartz counter top. I cut them to size with a diamond saw blade, but the one I tried was totally unsuccessful. I have ruined enough drill bits and carbide lathe tool inserts that I'm throwing in the towel. I managed to get a pretty decent hole through one of them with a 3/8 carbide drill bit, hole is more like 10mm though. Rather than just throw them away, I thought I would offer them to anyone who might want a crack at them. All 4 go as one shipment and I'll pay the shipping cost, sorry USA only. They are 3" long.