sink & step drills

Sink & Step Drills For Screw Thread (M-119) – 180 Degree Specially designed drillsthat are suitable for drilling cone holes for general screws and hexagonal head screws. Allow for two machining processes accomplished by one process, and provides superior concentricity. Specification d – mm D – mm L – mm l – mm l1 – … Read more

Sink & Step Drills For Screw Thread (M-118) Specially designed drillsthat are suitable for drilling cone holes for general screws and hexagonal head screws. Allow for two machining processes accomplished by one process, and provides superior concentricity. Specification d – mm D – mm L – mm l – mm l1 – mm ds – … Read more