... stone slab,porcelain,brick, concrete Diamond core drill bit, brazed or laser weldingBrazed or laser welded core bits Model:TK-E Type Application ... : For drilling stone slab, tile , porcelain , brick ,and concrete . Diameter Segment height Segment Qty ... ")9mm475mm51mm / (2")9mm475mm63mm / (2-1/2")9mm575mm76mm / (3")9mm575mm diamond core drill bit ,TK-E