The A190209 is a set containing 91 different metric sizes of our A100 drills in a plastic storage case. The case opens out for easy access to the drills and keeps the drills in size order. The sizes are clearly displayed which makes it easy to select the correct diameter. The A100 drills in this set can be used for both hand held and machine drilling in different applications. With a 118 degree split point to provide strength and reduce the cost of regrinding, the A100 is suitable for drilling in a number of materials including steels, aluminium and stainless steels The drills have a steam oxide finish to help prevent workpiece material from sticking to the cutting edge. Above 6.00 mm diameter, all A100 drills have a patented silver ring so you can be sure this is a genuine Dormer drill and the etched diameter makes it easy to find and see. With a huge range of 91 different diameters of the A100 drill, the A190209 drill set covers all your metric drilling needs. *Note: all drills below 1mm are bright.