0.3125″ (5/16) Min Bore DIA x 0.500″ (1/2) Max Bore Depth x 0.0330″ Tooth Width x 0.1000″ Projection x 0.3125″ (5/16) Shank DIA x 2.50″ (2-1/2) Overall Length x 0.0030″ Radius – Carbide Retaining Ring Grooving Right Hand, AlTiN Coated