- Spotting drill bits are designed with minimal flute length, and stub overall length, to keep the point doing the spotting as rigid and accurate as possible. These spot drills are used to spot a hole to be followed up later for drilling with a standard style drill bit. Available in solid carbide with a choice of three included angles. Choose from either 90, 120 or 142 degree spot drills included angle point. Choose from uncoated, or ALTiN coated, for more demanding applications in ferrous metals and cast irons.