... operation, high precision, long life, the knife precise .2,the machine adopted seamless welded steel structure,high strength and good rigidity ... efficiently improves tool life Scopeapplication:granite, marble, blue stone, sandstone and other hard stone carvings can be up to 5mm if engraved ... . can be engraved to 5mm thick in one time Sample cnc stone engraving machine (9015/1218/1325)