DCMT 21.5 Back Boring Head for Anti-Vibration Boring Bars, 25 mm Dia., Right Hand

93° lead, positive insert held by a screw. Cuts on the pull-out stroke, to face the back of a shoulder or bore behind a narrower entry. Fits anti-vibration bars with a 25 mm (0.984") coupling, 1" bars included. Minimum bore: 1.260" (32 mm). Insert sold separately.