Tool life of these boring tools is extended because each bar has more steel behind the cutting edge for a heavier,chatter free cut,a deeper bore and more precise work. The same bar can bore flat bottom holes or face.
All shanks are ground to +- 0.0005″.

Lengths are

50 mm  55 mm  60 mm  x 2  70 mm  75 mm x 2   80 mm & 90 mm