Far pneudraulic Insert tool for M4 to M12 or 6-32 to 1/2-13. Spin-Pull technology with semi-automatic load of the insert. Constant and perfect installation every time. Adjustable stroke. 2 trigger system that prevents jamming the insert on the mandrel. Long lasting mandrels. Heavy-Duty and reliable tool. Compatible for UNC or metric. Sold with 8x UNC heads or 6c Metric heads, your choice.