From general steel sheets to the latest ultra-high-strength steel sheets All with this one !

●It is possible to use for all other steel sheets such as Swedish steel, hot stamped steel, ultra-high tensile steel plate.
●Re-sharpening only at 1st grinding position, you can see the perfect drilling like new one.
(It is possible to grind with other ROKEN at 1st grinding position.)

Cutting Example

（Comparison）

●Air Drill Rotation Speed　：　1,000～1,200rpm