The premium Alpha Drill Bits are ideal for the widest range of materials. Drills faster and longer. Tough plastic case Rugged rubber grips Genuine Alpha Silver series jobber drill bits Strong locking catch Feeds & speeds chart inside every drill set Sizes available: 1.0 - 13.0 in 0.5mm increments • The Alpha Silver Series Drills boast the highest quality M2 HSS Jobber Drill. • 118º degree split point eliminates the need for centre punches or pilot drilling. • Industrial quality. • Ideal for general purpose drilling, especially non-ferrous metals