Trend Professional Ovolo Jointer & Scriber Cutters 28.7mm Diameter x 17.7mm Cut x 6.35mm Radius x 8mm Shank 25/3X8MMTC - Octacut - Eight Shapes in One Key Features: These 'Eight in One' Cutters sets have been designed to cut eight different profiles Can be used portably or in a router table Use B2 for a 1.6mm quirk and B3 for a round over Specification: D: 28.7 mm (metric diameter) C: 17.7 mm (metric cut length) B: 9.5 mm (metric bearing diameter) B2: 12.7 mm (metric bearing diameter) B3: 16 mm (metric bearing diameter) R: 6.35 mm (metric radius) OL: 72.2 mm (overall length) Shank Diameter: 8 mm Timber thickness min: 7 mm Timber thickness max: 10 mm