... for various masonry drilling purposes. Copper brazing with longer life. TCT Core Drill with smooth wall, especially better for cutting ... variou tiles, ceramics, granite slab, stone,etc. with max cutting ... 140721614072M16, male15Smooth7011.150721615072M16, male15Smooth7011.160721616072M16, male15Smooth TCT Core Drill 72MM Length Light Duty