Dormer A170 HS 1/2in Parallel Shank Drill 20.00mm OL:158mm WL:84mm | A17020.0

Dormer A17020.0 20.0mm HSS Parallel Shank Metal Drill Bit (1/2in Shank, 158mm OAL)

Dormer A17020.0 is a 20.0mm HSS parallel shank metal drill bit designed to help you drill larger diameters while still fitting a 1/2in drill chuck. It’s a practical choice for engineering, fabrication and workshop drilling where you need a strong, stable bit with a conventional reduced shank.

With an 84mm working length and 158mm overall length, this A170 series drill is well suited to general drilling tasks in metalworking environments, offering a straightforward setup for hand-held or pillar drill use when a 20mm full-size shank would not be compatible.

Key Features

• 20.0mm drill diameter: Ideal for larger holes where standard jobber bits may be undersized for the task.
• 1/2in parallel shank: Helps the bit fit conventional 13mm/1/2in chucks while drilling a larger 20mm diameter.
• HSS construction: Built for general-purpose drilling performance in workshop and site conditions.
• Jobber-style proportions: Provides a practical balance of reach and control for day-to-day fabrication and maintenance drilling.
• 84mm working length: Useful drilling depth for many common steel and metal stock sizes.

Specifications at a glance

Suitable applications

• General workshop and fabrication drilling where a 20mm hole is required.
• Use in drills with 1/2in chuck capacity that need larger-diameter drilling capability.
• Maintenance and installation tasks where reduced-shank drilling is preferred for compatibility.