Inquiry (采购产品): Rock Drilling I am considering using air abrasives in drilling 5mm holes mabe 6mm deep in quartz. What kind of micro units do you have and about how long would this take? I am gem carving and I'm looking for quicker methods. Thanks W. Pearson **** Hidden Message ***** William Pearson 98045 Company: Pearson Lapidary E-mail: maxklear@yahoo.com **** Hidden Message ***** maxklear@yahoo.com
