Offset Tongue and Groove Router Bit Set - 3 PC Set Carbide Cutters with Non-Stick coating to reduce pitch and build-up CNC milling technology producing a balanced, smooth cutting bit Two bit system with guide bearings provides interlocking tongues and grooves for 1/2" to 1-3/8" stock Also includes flush trim router bit The shanks on this set are 1/2". The set comes in a wooden storage box.