Versatile: the round shank bit is ideal to drill through round surfaces. The drill bit tool works best with stationary machines HSS Drill Bit: the SST+ drill bit contains cobalt blend that ensures longer lifespan of the tools allowing you to drill more holes with each bit Sturdy Case: the complete drill bit set is packaged in a durable shock resistant metal container weighing 2.65 lbs. The set includes 29 pieces of drill bits sized from 1/16 in. to _ in. Compatibility: the high speed drill tool is compatible with steel stainless steel aluminum and other ferrous and non-ferrous metals Ease of Usage: the size for each jobbers length drill bit is clearly marked on the inside panel for a quick identification and selection The 29-Piece Jobber s Length Bit set by Walter Surface Technologies is manufactured with a cobalt blend to ensure longer lifespan of the tool and more holes with each bit. All the round shank drill bits in this set are ideal to be used for drilling through round surfaces. Drilling smoothly through steel stainless steel non-ferrous and non-ferrous metals the jobber length bit can also be used for drilling with stationary machines. The set comes neatly packed in a sturdy shock resistant metal box and the sizes of all the HSS tools are clearly marked on inside panels for easy identification and selection.