Dormer A170 Parallel shank drills with a standard helix, right-hand spiral, 1/2in parallel shank drill, often referred to as a Blacksmith's drill. General-purpose drill, ideal for a wide range of materials where chuck holding capacity is limited.Suitable for both hand and machine use.Select Option 14.00mm15.00mm16.00mm18.00mm20.00mm Add to Basket Quantity