Milling Boring Head Set With MT2 Shank Diameter 38mm (1.5") High Precision Boring Head for Milling Machine of Head Diameter 38 mm Supplied with 2MT (M10 & 3/8"whitworth drawbar)  Head diameter - 38mm Capacity with vertical tool - 0-38mm  Maximum boring diameter excluding tool - 60mm For tooling diameter - 8mm  1 Division: 0.015 mm Accepts 8 mm diameter tooling Supplied with 3 Carbide brazed boring bars.