Trend IT/1742379 Solid tungsten up and down spiral single flute 12 mm diameterSingle fluteSolid tungsten carbide router complete with one up and down compression spiral flutes. Compression spiral ensures material is squeezed into the middle to give a fine finish on both surfaces of solid hard & soft wood. Dnamic (tm) carbide for maximum durability in abrasive materials. For use on routers and machining centres with or without CNC control.Specification-D=12 mmCut lng.=42 mmOverall lng.=90 mmShank Diameter=12 mm