1.cnc engraver 2engraving for marble,granmtie,sandtone,inkstone,tombstone,steles 3.water-proof, ... of the spindle0-24000rpm/minHigh Frequency Spindle, continuously variable transmission, low noise, complete with carving tools, and embossed carving features. ... tile, metal, wood, acrylic, aluminum composite panel and other hard surface for processing cutting, relief and other functions. You need it ?