[Features] ● Anchors can be inserted smoothly by drilling holes that are close to perfect circles. -By adopting a cross blade on the cutting edge, it is possible to penetrate the deck plate. ●Because it is possible to drill a hole close to a perfect circle, anchor insertion can be performed smoothly. ●It maintains stable drilling performance with a cross blade that has less biting even when it hits reinforcing bars and less wear on the cutting edge and outer diameter.