ITEM NAME:2 Pieces Woodworking 1/2" Shank Tongue & Groove Joint Description: Brand new, high quality, industrial grade Matched Tongue and Groove Assembly with 3 Flutes to generate more balance cut C3 Car.With this set you can use one bit to groove the slot and a other bit to mill the tongue. Matched Tongue and Groove Assembly with 3 Flutes to generate more balance cut. 12.7mm/ 1/2". SKU: DMO0009641053023113.