Profile: Inertia Industrial is more than a typical distributor. We are a industrial supplier with strategic warehousing locations, cutting back on shipping time and costs. We have a strong focus in power transmission products but also have the ability to source and supply standard or custom parts regardless of the industry or application. From lawn mower wheel bearings to mil-spec fasteners, we've seen and sourced it all. Jobber Drill Bits are the most common type of drill size available today and the term is used to generally refer to drills that are between 9 to 14 times the diameter in length. Some specifications place the jobber bit size between 8 to 12 times the diameter of the drill, while other specifications place it between 9 to 14 times. Our Jobber Drill Bits are available in High Speed Steel, Cobalt and Carbide.