Trend Professional Replacement Tip Router Cutters RT/75X1/2TC - Rota-Tip Double Guided Trimmer 19.1mm Diameter x 50mm Cut Key Features: Ball bearings fitted to both nose and shank Allows templates to be placed either on top or the bottom of the material, for ease of routing Allows for irregular grained timber to be profiled more easily by turning component other way round Two blade tool for clean cut Each blade can be rotated 180 degree to give double the life of a conventional tool Specification: D: 19 mm (metric diameter) C: 50 mm (metric cut length) B: 19.05 mm (metric bearing diameter) OL: 113 mm (overall length) Shank Diameter: 1/2 inch Blade screw: SP-46/02D Bearing screw: RT/M4.0