Dormer A100 7/32in HSS Jobber Drill DORA100732 Dormaer A100 series general purpose HSS jobber drills are suitable for use in the majority of general purpose engineering applications. They have good self-centring capability on a wide range of materials and are suitable for both hand and machine use.DIN338RN BS328 ISO235 Size. 7/32in DORA100732