Ideal for starting screws, auger gimlets have a tapered screw tip and an auger body. The seven sizes in the set range from 2mm to 5mm (5/64" to just over 3/16"), which will handle the pre-drill for screw sizes No.2 to No.10. They are particularly useful for short screws or screws in awkward places, both of which present problems for power pre-drilling. In tempered steel, ferro-blacked in the traditional manner, this set was made specifically for Veritas by a small European maker.