种类
Silver & Deming Twist Drill bit
表面处理
发黑, White, Black Oxide&polish, Titanium Plating, Cobalt Plating, Amber, Amber &black Oxide
型号
Silver & Deming Twist Drill-ASME
Process
Roll Forged, Roll&Polished, Fully Ground, Milled
Standard
DIN338, DIN340, DIN1897, DIN1869, Jobber Length
Shank
Straight Shank , reduce shank , Triangle ,Milled Hexagon