Extra Length Drill Bits are designed for general purpose drilling where extra reach is needed. Extra length drills can be very fragile and easily broken so it's usually best to drill as deep as possible with a jobber or shorter bit before switching to an extra length drill bit.
Taper Length HSS Drill Bits
Taper Length HSS Drill Bits
These Taper Length Drills are designed to be used in applications requiring a longer overall length and length of cut are required.