15pcs Diamond tool drill bit hole saw set for glass ceramic marble from 6-50mm

Descripción

With high quality, good performance and long life, this new diamond coated core drill bit is easy to use Can remove a complete cricle from glass, tiles, marble, granite, ceramic or other materials Only need water for lubrication,and always use it,otherwise the diamond core drill will burn Excellent for making clean and accurate hole on glass, tile, and marble Start a hole diagonally, make a round trace and the hold drill straight Can be used with a standard electric drill(but not for this item)