Trend 2/40LX1/4HSS Pocket cutter 4.8 mm diameterSingle Flute PocketThese are made from a single pce of High Speed Steel, ground with a very fine edge. They are only suitable for non abrasive materials, but will give a superior finish in soft timbers. Generally HSS cutters are slightly less expensive than their TC grades, but can be more suitable for certain applications.Single flute cutters with extra long shanks.Specification-D=3/16 inchD=4.8 mmC=19 mmOL=60 mmShank Diameter=1/4 inch