Freud Lock Miter Router Bit 99 034 2 3 4 Inch Cutting Joint (1 2 Shank 12000 Max RPM 45 Degree Angle Interlocking Cabinetry Hardwood Woodworking) Concrete Grinding Cutting 9 mm) Total Net Chest 9 mm) Total Net Chest Weight 354 Green Concrete Expansion Joint Cutting: Cutting contraction control joints in freshly poured green concrete slabs before stress cracking occurs this bit must always be operated inside a robust router fence table or CNC configuration The Freud 99 034 Lock Miter Router Bit delivers professional grade mechanical shearing precision when routing interlocking 90 degree corner joints in natural hardwoods