Chucking Reamer, Straight, Decimal Size .4770 In., Large End Dia. .4770 In., Shank Dia. .4770 In., Flute Length 1-3/8 In., Overall Length 4 In., Number of Flutes 4, Chamfer 6 Deg., Cutting Direction 45, Material Solid Carbide, Finish Bright, Application Bright, Metric Size 12.12mm