Halls MC 3M High-Speed Steel Step Drill 20-30mm | MC3M

Halls MC3M Step Drill Bit (HSS) 20–30mm, 13mm Shank

The Halls MC3M step drill bit is a high-speed steel (HSS) metal drilling accessory designed to open out and size holes from 20mm up to 30mm in a single bit. It’s ideal for controlled enlargement of holes in sheet materials, helping you reach the required diameter without swapping between multiple drill sizes.

With a 13mm shank, the MC3M is made to suit compatible drill chucks and is specified for use on material up to 4mm thick, making it a practical choice for fabrication, maintenance and installation tasks where clean, accurate hole sizing is needed.

Key Features

• 20–30mm step range: Covers multiple common hole diameters with one bit for efficient sizing and enlargement.
• Incremental steps: Helps produce controlled, repeatable hole sizes without changing drill bits.
• High-speed steel (HSS) construction: Designed for metal drilling applications where durability and edge retention are important.
• 13mm shank: Fits compatible drill chucks for stable, secure driving.
• Sheet metal suitability: Specified for use on materials up to 4mm thick for predictable results on thin sections.
• Coolant guidance: Recommended use of coolant when drilling metals to support tool life and cutting performance.

Specifications at a glance

Suitable applications

• Enlarging and sizing holes in sheet metal up to 4mm thick
• Electrical and mechanical installation work where multiple hole sizes are required
• General metalworking tasks where controlled, step-by-step cutting helps improve accuracy