Stub drills are shorter than standard length jobber length drill bits. 

Used for drilling holes in steel and aluminium and similar materials, the shorter construction performs well on a range of materials, as it gives them maximum rigidity and a longer life. 

Stub drill bits are mainly used for drilling a variety of hole sizes and for making a hole or a larger blunt tip which is used to enlarge a drilled hole.

Diameter: 4.4mm