2pcs T-Slot Router Bit Set Tenon Cutter Adjustable Blade Flush Trim Router Bit
6mm-100mm Diamond Hole Saw Cutter Drill Bit Set for Tile Glass Ceramic Marble. Shank: 1/4"(12.7mm) 1/2"(6.35mm. With this set you can use the one bit to groove the slot and another one bit to mill the tongue. ).