This Trend 4/2 x 1/4 TCT Two Flute Cutter has the following specification: D: 16mm (5/8in) C: 19mm OL: 52mm Shank Diameter: 1/4in The Trend Two Flute Straight Cutters produce a cleaner finish than the single flute cutters. Suitable for grooving, rebating, morticing, drilling and shallow lateral routing cuts such as recessing hinges. Corners will require a final trimming square with a hand chisel or a corner chisel. Suitable for abrasive materials such as chipboard, MDF, plywood, hardwoods and hard plastics.