Trend IT/1743580 Solid tungsten up and down spiral two flute 20mm diameterTwo fluteSolid tungsten carbide router complete with two up and down compression spiral flutes. Compression spiral ensures material is squeezed into the middle to give an extra fine finish on both surfaces of laminated and veneered board. Dnamic (tm) carbide for maximum durability in abrasive materials. For use on routers and machining centres with or without CNC control.Specification-D=20 mmCut lng.=72 mmOverall lng.=135 mmShank Diameter=20 mmB1=20 mm