... in significantly longer tool life, precise engraving·Specifically designed to engrave 3D Relief on marble ,granite ,sandstone , ... stone , these tools will give a fast engraving and cut·Cel:7·Ced:3·Overall ... hours·We are open 7 days a week, 365 days a year support·We are here for ... samples, if want to engrave it . please contact me . I can show you how to do it . Diamond Engraving ...