This Trend Craft Pro C145 1/4in shank Bearing Guided Slotting Cutter has a 31.8mm diameter with two flute carbide tips for cleaner cutting edges and fast clearance of waste in all timber and timber-based materials.The cutter is a fast, easy and accurate way to make slots and grooves in board edges, ideal for fitting panels.The slot dimension is matched to 6.3mm/1/4in thick sheet material with 9.5mm depth of cut. Bearings can be swapped to alter groove depth. It has PTFE coating to minimise heat and resin build up for increased cutter performance and longevity. This Trend Craft Pro has a 1/4in shank for easy control in smaller routers with 'K' mark shank to ensure safe working practices.D: 31.8 mm.C: 1/4 inch.C: 6.3 mm.B: 12.7 mm.E: 9.5 mm.OL: 65 mm. Specification: Shank Diameter: 1/4 in.