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Milwaukee 18 in. Alloy Steel Drill Bit Extension 7/16 in. Hex Shank

The Milwaukee 18 in. Alloy Steel Drill Bit Extension with a 7/16 in. hex shank is built to push your projects farther—without compromising control or durability. Designed for profe…

Milwaukee MPN 48-28-4011
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This product isn’t sold on our website — see your local hardware store.

Typical Store Price i
Typical store price: low $19.99, average $23.99
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About Product Overview

The Milwaukee 18 in. Alloy Steel Drill Bit Extension with a 7/16 in. hex shank is built to push your projects farther—without compromising control or durability. Designed for professionals and serious DIYers who routinely reach into tight or overhead spaces, this extension turns hard-to-reach spots into doable tasks.

  • Extended reach, real-world utility: An 18-inch length gives you the leverage to drill or drive where a standard bit would fall short—think behind cabinets, over joists, or into deep pockets, all without changing your working position.
  • Rugged alloy steel construction: Engineered for repeated use in wood, metal, and composites, the extension resists bending and maintains true alignment under load.
  • Secure 7/16" hex shank: The hex shank provides reliable engagement with hex bits and quick-change drivers, reducing wobble and ensuring consistent torque transfer.
  • Quick-change mechanism: Swap bits quickly while the extension stays aligned with your drill, cutting downtime and keeping you in the task rather than fumbling with hardware.
  • Non-magnetic design: Ideal when magnetism could interfere with delicate parts, electronics, or filing systems—this extension keeps the workspace clean and predictable.
  • Not designed for impact: Optimized for standard drilling and driving tasks—avoid high-torque hammer or impact scenarios to preserve long-term accuracy.
  • Carded packaging, single unit: Easy to identify on the shelf or in a tool bag, ready for immediate use in your next job.

Ideal for electricians, plumbers, automotive technicians, HVAC installers, and woodworkers who regularly tackle hidden corners, this Milwaukee drill bit extension is the practical upgrade that turns cramped spaces into workable areas. Use cases include wiring in tight wall cavities, mounting long screws into studs, or guiding bits through shelving units where a traditional length just won’t reach.

Why choose this extension over shorter options? It combines Milwaukee’s durable alloy steel with a true 18-inch reach and a quick-change capability that keeps your workflow flowing. It’s a specialty tool for specific challenges—designed to deliver dependable alignment, consistent torque transfer, and the flexibility to handle a broader range of tasks without swapping setups.

Pro tips: pair the extension with hex-shank drill bits and compatible quick-change drivers for fastest bit swaps. Keep the tool dry and wipe it down after use to protect the alloy steel from moisture-related corrosion. If you’re tackling overhead installations or deep hollow spaces, this 18 in. extension is the reliable companion you’ll reach for again and again.

The Details Specifications

Brand Milwaukee
SKU 28959
UPC 045242122561
Unit 0
Case Pack Quantity 2 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 20 × 2 × 0
Weight 1 lbs
Cubic Feet 0.03595 ft³
Country of Origin CHINA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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