STRAIGHT SHANK TWIST DRILLS FOR ALUMINUM JOBBER Application Drilling into aluminum and its alloys, silumin, zinc, refined copper, wood and other soft synthetic materials. 品名:高速钢直柄铝用加长麻花钻 用途:可钻削铝以及铝合金、硅、锌、精炼铜、本头以及其它软质人造材料。