General description Dormer A170 Parallel shank drills are designed for general-purpose use, ideal for a wide range of materials where chuck holding capacity is limited. This 1/2in parallel shank drill, often referred to as a blacksmith's drill, features a standard helix and right-hand spiral, making it suitable for both hand and machine use. Technical specifications Tip diameter: 16 mm Working length: 84 mm Overall length: 157 mm Usage This drill is intended for general-purpose light-duty work only. Caution is advised, as fracturing of the drill shank may occur if used for purposes beyond its intended use or if extreme pressure is applied.