Unibor Multicut Step Drill, M2 HSS spiral-flute step drill with 3-flat and impact shank options

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Unibor Multicut Step Drill

★★★★★

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SKU: 06S7EIMPCO

Size: 1/8"-1/2" Unibor Multicut Step Drill, 3-Flat Shank

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$36.45

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Higher-Grade M2 HSS: Made from higher grade M2 High Speed Steel for roughly twice the life of standard power-tool step drills.
Spiral Flute Cutting: Spiral flute design cuts about 30% faster than straight-flute step drills.
Split-Point Starts: Split-point technology delivers about 50% faster starts with less walking.
3-Flat Shank (Standard line): Multicut Standard sizes use a 3-flat shank for secure chucking in a standard drill.
Impact Shank (Impact line): Multicut Impact Shank sizes add Dual Flute Technology and an impact-rated shank for quick, accurate drilling with impact drivers.

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*Please Note: This timeline is an estimate. Certain products may require an additional 1 week for manufacturing. Please speak with your sales rep, Matthew, for official details and confirmation before placing your order.

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Flexible Financing

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Brand	Unibor
Model/SKU	Multicut Step Drill / Multicut Impact Shank Step Drill (size selected via variant)
Type	Step Drill
Diameter Range	Varies by size selected — see variant options for the full range per SKU
Shank Type	3-Flat shank (Standard line) or impact-rated shank (Impact Shank line) per variant selected
Flute Type	Spiral flute, split-point starts
Material	M2 High Speed Steel (HSS)

Key Information

Order Cutoff Time: 2:00 PM EST
Order Handling Time: 1–3 business days (Monday–Friday)
Transit Time: 1–7 business days (Monday–Friday)
Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
Shipping Availability: Free Shipping On some Items In The Contiguous United States only

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Frequently Asked Questions

A step drill bit enlarges and creates round holes of several diameters in thin materials like sheet metal, plastic, and wood using one conical bit, producing clean, burr-free holes without swapping bits.

It's commonly known as a "unibit," a name that comes from the original Irwin Unibit design, though "cone drill bit" is also used.

Yes, quality step drill bits made from HSS or cobalt steel cut fast and cleanly in thin metal and plastic, though they aren't meant for drilling deep into thick solid stock.

No, most step drill bits have a sharp split-point tip that starts cleanly on flat material without a pilot hole.

Step drill bits vary by flute design (straight or spiral), coating (titanium, cobalt, black oxide, or specialty coatings), step increments, and shank style, including round, 3-flat, and hex impact shanks.

Choosing the right step drill bit depends on the material and thickness you're cutting, the hole-size range needed, your drill's chuck or shank type, and the bit's steel grade and coating for durability.