1Smoothly Cut To Tooth Width: The tongue groove router bit can smoothly cut to tooth width, resulting in clean, no debris 2Non Backlash Design: Rugged body of T shaped cutter with non backlash design, more sturdy and durable for you to use 3For Handmade Drawers Or Other Woodwork: Suitable for handmade drawers or other woodwork, can be used for wood side to side or end to end connection 4For Wood Or Floor Tenon: Wood milling saw cutters are used for wood tenon, floor tenon, helps a lot in woodworking 5Long Service Life: This grooving cutter possess stable structure, excellent performance and long service lifeItem Type: Tongue Groove Router BitTool Handle Diameter: Approx. 8mm / 0.31in, Cutter Head Diameter: Approx. 28.5mm / 1.12inMaterial: YG6 primary alloy + 45carbon steelBalance: 0.003in toleranceUses: Used for wood tenon joint, floor tenon joint1 x Single Tooth Tenon Knife1 x Double Tooth Tenon Knife2 x Storage BoxPlease allow tiny size error due to manual measurement. Thanks for your understanding.