12Pcs 3 Inch Boring Head R8 Shank 3/4 Inch Carbide Boring Bar Boring Head Bar Milling Set$$Tools & Hardware Other

Boring Head size: 3" ;Boring Head Height: 3-5/32" ;Shank Taper R8 ;Shank To Head 1-1/2"~18" ;Tool Capacity Up to 3/4" Maximum Offset 1".Graduations: 0.001" Boring Head: Bar holder moves smoothly Design assures superior rigidity for chatter-liberty boring and accuracy hole size accuracy Hardened and ground adjusting screw designed for long lasting and trouble use