【High Quality Drill】Each hole is treated with smooth and accurate surface treatment,and the top oh the hole is thickened to achieve excellent cutting strength
【Easy Operation】Always use lubrication (water ), otherwise the diamond core drill will burn,Start your hole diagonally, make a round trace and then hold drill straight.
【Wide Usage】Used on Drill Glass,Wood,Tile Bottles,Blocks Jars, Ceramic,Slate Mable, Granite Light Stone, and other hard surfaces
【Good Performance】Hole Saw Sets Kits Can be used with a standard electric drill( Excluding in this item );
【Tip】Materials and only needs water for lubrication.Works better with a electric drill;