Browse our offering of Drillco’s made in the USA jobber drill bits available in standard sizes as well as metric options too. The general purpose bits are manufactured with high-speed steel, or black oxide HSS, are excellent for everyday projects. If you require heavy-duty bits manufactured with premium grade materials, choose the black and gold Nitro option. The heavy-duty Nitro line bits offers an increased hardness rating increased by the Nitride surface treatment. Jobber drill bits are suitable for hand held and machine drilling, offering a balance between rigidity and mid-length with a 118-degree point angle.