Trend Professional Template Profilers 46/910X1/4TC - Guided Profiler 12.7mm Diameter x 4mm Cut x 1/4" Shank Key Features: Profiler with shank mounted bearing guides For use with router mounted above or below a table when following a template For profiling and rebating applications only Not for plunge cutting/grooving A 3mm maximum overlap should be left before trimming They are ideal for template making Has a shorter cutter length for use on thin boards Specification: D: 1/2 inch (imperial diameter) D: 12.7 mm (metric diameter) C: 4 mm (metric cut length) B; 12.7 mm (metric bearing diameter) OL: 60 mm (overall length) Shank Diameter: 1/4 inch