Unibor Impact Pro Step Drill, M42 Cobalt spiral-flute step drill with impact shank

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Unibor Impact Pro Step Drill

★★★★★

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SKU: 06S1EIMPCO

Size: 1/8"-1/2" Unibor Impact Pro Step Drill, Spiral Flute

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Price:

$36.45

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Financing as low as ~$0 / month (60 mo. terms) Estimate your payment

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M42 Cobalt Steel: Constructed from high-grade M42 Cobalt Steel for roughly 30% extended tool longevity versus standard step drills.
Spiral Flute Design: Spiral flute configuration cuts roughly 30% faster than straight-flute step drills.
1/4" Impact Shank: Equipped with a 1/4" impact shank optimized for impact-driver compatibility.
Knock-Out Sizing Available: Offered in select ‘Knock-Out’ multi-diameter configurations for larger hole ranges in one tool.

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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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Experience: 20+ Years B2B • Origin: US-Based Support

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Flexible Financing

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Brand	Unibor
Model/SKU	Impact Pro 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	1/4" impact shank
Flute Type	Spiral flute
Material	M42 Cobalt Steel

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 bit cuts multiple hole diameters with one tool, resists grabbing or warping thin sheet metal, and deburrs the edge as it cuts, so you avoid swapping bits or using a center punch.

It's often called a unibit or cone drill bit, named for its stacked, tree-like profile of progressively larger diameters.

Yes, as long as the bit has a 1/4 inch hex shank built for impact use, like the Impact Pro Step Drill, which locks directly into an impact driver's collet without an adapter.

A twist bit cuts one fixed hole size, while a step bit's cone shape with multiple diameters lets you drill a range of hole sizes with a single tool, deburring as it goes.

They work best on sheet metal, plastic, and wood up to a few millimeters thick, rather than solid bar stock or thick material where a twist bit or annular cutter is more appropriate.