YSK
YAMAMOTO SEIKO is a manufacturer of YSK brand small size HSS/HSSCO Straight Shank Drills & Micro Drills in increments of 0.01mm step, and high grade YSS High Speed Steel called as YASUKI HAGANE is used for their Drills. Uniformed heat-treatment subject to the strict production control, and long service life, are pride of YSK.