The A09518 set consists of an assortment of 29 different fractional sizes of our A100 drills in a handy plastic case. The A19018 set contains all of the drills in size order, with sizes clearly displayed making it easy to select the diameter you need. The A100 drills in the A19018 set have a conventional 118 degree point, providing strength and making the point is easy to regrind. This means the A100 is a very cost-effective drill. Suitable for machine drilling and hand drilling in a number of applications, the A100 from Dormer is made with a steam oxide finish which reduces the probability of work piece material sticking to the cutting edge of the drill. It is suitable for drilling a number of materials including steels, aluminium and stainless steels. With the patented silver ring on the Dormer A100 drill from size 1/4 inch and above, you know this is a genuine Dormer drill and the drill size easier to spot. The A19018 drill set from Dormer is a good range of Dormer?s fractional drills. *Note: all drills below 1mm are bright.