1. Largest work range by using 3 inserts holders for each boring head; 2. Balanced at midpoint of travel for high cutting speeds and improved bore quality; 3. Insert holder can be mounted in opposite direction for back bore applications; 4. Coolant through the boring head towards the insert; 5. Adjustment within 0.01mm on the diameter; 6. Diameter setting protected by the insert holder and head contact; 7. Large range of insert grades for all materials; 8. Easy assembly and interchange of the insert holders 9. Informative laser marking on each boring head. Gift box and cartons for air and sea shipment.