Make tongue and groove joints without the complicated process of taking apart and reassembling bits. The new Torquata tongue and groove set gives you one bit to groove the slot and a separate bit to mill the tongue for a perfectly matched set. Or use your imagination and put them to work individually on other projects. The slot cutters are 1/4in (6.4mm thick) with a 6.4mm gap. This bit makes tongue and groove cuts in timber up to 19mm (3/4") thick, generally recommended for 13-19mm. Available in 1/2in shank only.