EZARC Step Drill Bit Set – M35 Cobalt HSS, AlTiN Coated, 1/4 inch Hex Shank, 1/8 to 7/8 inch (3 pcs)

EZARC Step Drill Bit Set: Precision for Metalworking

Whether you’re resizing metal panels, preparing holes for fasteners, or drafting custom enclosures, EZARC’s Step Drill Bit Set is built to deliver controlled starts and clean holes across a range of materials. The triple-flute design adds stability, reducing wandering and chatter as you begin each hole. The C-profile cutting edge works with the material’s grain to produce smoother cuts and a quicker initial bite compared with standard step bits.

Rugged materials for demanding jobs

Crafted from M35 cobalt high-speed steel and hardened through heat treatment, these bits balance toughness with dependable bending strength. This makes them well suited for tougher metals and thicker sheets, offering confidence when drilling in rugged workpieces.

The AlTiN coating increases surface hardness and lowers friction, delivering excellent heat resistance. By limiting heat buildup and edge wear, the coating helps maintain cutting performance across multiple holes and extended drilling sessions.

What’s included and how it helps you

• Three step drill bits are neatly organized in a compact case for easy transport and storage.
• The stepped geometry enables multiple hole sizes in a single pass, reducing tool changes and speeding up workflows.
• 1/4 inch hex shank ensures compatibility with common drills and quick bit changes.

Usage guidance and limits

This set is ideal for metal sheets up to 1/8 inch (3 mm) thick and stainless steel sheets up to 1 mm thick. For continuous drilling, applying cutting oil or coolant helps manage heat and maintain edge quality. Because of larger cutting angles, startup speed may be slower on very dense materials, so plan for a gradual feed.

Real-world benefits you may notice

• Cleaner holes with smoother progression when drilling through metal, aluminum, or plastics.
• Improved tool life under challenging conditions thanks to cobalt steel and protective coating.
• Flexible sizing from 1/8 inch to 7/8 inch using a single drilling pass, depending on material.

In daily shop use, you’ll appreciate the balance of performance and convenience. The compact case keeps your bits protected and easy to locate. The combination of M35 cobalt and AlTiN coating offers dependable toughness and heat management, helping you complete projects with fewer interruptions between holes.

• Stability and control: triple-flute design reduces wandering during entry.
• Durability: AlTiN coating and M35 cobalt ensure resistance to heat and wear.
• Versatility: a 3-piece set covers a wide range of hole sizes for metal, stainless steel, and more.