Standard helix, right hand spiral, 1/2in parallel shank drill, often referred to as blacksmiths drills.
General purpose drill, ideal for a wide range of materials where chuck holding capacity is limited.
Suitable for both hand and machine use.

WARNING:-
For general purpose light duty work only.
Fracturing of the drill shank may occur if it is used for any other purpose or if extreme pressure is exerted on the drill.

Size. 11/16in