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RS PRO Cobalt Steel 20mm Hole Saw

8 In stock for delivery within 6 working days
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RS PRO HSS 20mm Hole Saw Bi-Metal

This bi-metal hole saw from RS PRO is a high quality hole cutter that is compatible with a detachable arbor and drill to produce a clean and precise circular hole in a range of materials. The RS PRO bi-metal hole saw features an alloy steel body with HSS (high speed steel) M42 cobalt (8%) teeth, providing excellent durability and reliability that can withstand extensive rigorous use. The bonded bi-metal, alloy and HSS construction reduces the possibility of shattering whilst cutting holes and ensures precision is maintained.

Features and Benefits

  • Contains cobalt 8%, strengthening the hardness and endurance.

  • Hardened cutting edge (6 tpi alternate set) welded to a tough alloy steel body

  • Bonded construction reduces possibility of shattering

  • For use with ferrous and non-ferrous metals, plastics and wood to a depth of 32 mm

  • Available in a variety of sizes


Hole saws or hole cutters are an ideal solution to cutting a custom access hole into panels, which is handy for cable and wiring in machinery and workplaces. Hole saws feature an arbor that is either attached or attachable, allowing the hole saw to be used with a power tool such as a drill for a powerful and precise cut. Bi-metal hole saws with HSS cobalt teeth are perfect for providing a fast and clean cut in a range of materials and can be used for applications such as:

  • DIY

  • Electrical Installation

  • Plumbing

  • HVAC


Does this include an arbor?

No, this hole saw does not include an arbor.

What size arbor is recommended?

  • 14 to 30 mm dia. hole saws require a 6.5 mm arbor

  • 32 to 152 mm dia. hole saws require a 9.5 mm arbor

What materials is this compatible with?

This hole saw can be used to create clean and precise holes in a variety of materials such as wood, plastic, metal.

Drill Bit TypeHole Saw
Arbor IncludedNo
MaterialCobalt Steel
Cut Depth32mm
Number of Pieces1
TypeHole Saw