Milwaukee Tool 48-89-2370 15PC...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$116.86
$60.84
Milwaukee Tool 48-89-2370 15PC RED HELIX, Cobalt Drill Bit Set

Milwaukee Tool 48-89-2370 15PC RED HELIX, Cobalt Drill Bit Set

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Model: 48-89-2370
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$116.86
$60.84
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15PC RED HELIX, Cobalt Drill Bit Set

  • Features

    • RED HELIX, Technology combines QUAD EDGE, Tip, VARIABLE HELIX, Flute, and thicker tapered web
    • Thicker tapered web design increases bit strength
    • Cobalt for 15X Life vs. Black Oxide Drill Bits
    • 3-FLAT SECURE-GRIP, prevents bit from slipping in chuck
    • Ideal for use in Hard Metals such as stainless steel, cast iron & black pipe as well as wood & plastics
    • Designed for use with Drill Drivers
    • VARIABLE HELIX, flute designed for rapid chip removal
    • Customizable accessory case is designed for use in PACKOUT,
    • Laser etched size for easy identification
    • QUAD EDGE Tip, Stays Sharper Longer

Manufacturer Resources

Product Specs

Product Type:
Drill Bit Set
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Material:
Cobalt
Product Group:
Power Tools & Accessories

Milwaukee 48-89-2370 – Frequently Asked Questions

1) Will the Milwaukee 48-89-2370 cobalt drill bit set cut stainless steel and cast iron?
Yes. The 48-89-2370 RED HELIX cobalt bits are built for hard metals including stainless steel, cast iron and black pipe, and they also work in wood and plastics. The cobalt construction is what buys the life in those materials, rated at 15X the life of black oxide bits.
2) What is the difference between a cobalt twist bit set like this Milwaukee one and a carbide-tipped or diamond grit bit?
Three different jobs. The Milwaukee 48-89-2370 is a cobalt twist bit set for drilling metal, wood and plastic with a drill driver. A carbide-tipped rotary/percussion bit such as the Minerallac 59736 Relton 1/2 inch x 6 inch is for masonry and concrete under hammer action, and a diamond grit bit like the Lenox 12111-10DGHS 5/8 inch is for tile, stone and other abrasive materials. Do not substitute one for another; a twist bit will not survive concrete.
3) I need to drill through concrete block to mount a panel. Is the Milwaukee cobalt set the right thing?
No. Cobalt twist bits are for metal, wood and plastic, not masonry. For block or concrete you want a carbide-tipped rotary/percussion bit, for example the Minerallac 59736 Relton 1/2 inch x 6 inch. Keep the cobalt set for enclosures, strut, black pipe and steel studs.
4) Can the Milwaukee 48-89-2370 cobalt bit set be used to drill concrete or masonry?
No. The Milwaukee 48-89-2370 RED HELIX cobalt set is built for hard metals such as stainless steel, cast iron and black pipe, as well as wood and plastics, and is designed for use with drill drivers. For concrete and masonry you want a carbide-tipped hammer bit instead, such as the Minerallac 59736 Relton 1/2 inch by 6 inch carbide-tipped rotary/percussion drill bit, which is made to run in percussion mode.
5) Do these Milwaukee cobalt bits slip in a keyless chuck when drilling steel?
The shanks have Milwaukee's 3-FLAT SECURE-GRIP, which is three ground flats that keep the bit from spinning in the chuck under load. That is the main reason these hold in a cordless drill driver's keyless chuck when you lean on them in hard metal.
6) Does the case on the Milwaukee 48-89-2370 bit set fit a PACKOUT system?
It ships in a customizable accessory case built to work in PACKOUT, so it stacks and locks into a PACKOUT setup rather than riding loose in the van. Each bit is laser etched with its size, which matters once the case gets shuffled on a job.
7) What should I use to drill tile, glass or other hard non-metal material instead of a cobalt twist bit?
A cobalt twist bit like those in the Milwaukee 48-89-2370 RED HELIX set cuts by shearing with a QUAD EDGE tip and is intended for hard metals, wood and plastics. Abrasive non-metals are better handled by a diamond grit bit such as the Lenox 12111-10DGHS D/S-10Dg 5/8 inch diamond grit drill bit, which grinds rather than cuts.
8) I only need one large-diameter hole, not a whole index. What are my options?
The Milwaukee 48-89-2370 is a 15-piece cobalt set with laser etched sizes and a case built for PACKOUT, so it suits a tech carrying a full range of small metal-cutting sizes. For a single fixed-size hole, individual bits are the simpler buy: the Minerallac 59736 Relton is a single 1/2 inch by 6 inch carbide-tipped rotary/percussion bit, and the Lenox 12111-10DGHS is a single 5/8 inch diamond grit bit.
9) Can I run the Milwaukee RED HELIX cobalt bits in a drill press or magnetic drill, or are they for cordless drills?
They are specified for use with drill drivers, so a cordless or corded hand drill is the intended tool. The variable helix flute clears chips quickly at hand-drill speeds, and the thicker tapered web adds strength for the side load a handheld drill puts on a bit.
10) What makes Milwaukee RED HELIX different from a standard jobber twist bit?
RED HELIX combines three things: a QUAD EDGE tip that stays sharper longer, a variable helix flute that pulls chips out faster, and a thicker tapered web for strength. On hard metal that combination is what keeps the bit from walking at the start and from binding once it is buried.
11) How many bits come in the Milwaukee 48-89-2370 set and how do I order it?
Fifteen pieces, ordered as Milwaukee part number 48-89-2370. It comes as a complete set in its case, so there is no per-size selection to make.
How fast can I get the Milwaukee 48-89-2370 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Milwaukee 48-89-2370 come with a warranty?
Absolutely. The Milwaukee 48-89-2370 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Milwaukee 48-89-2370?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Milwaukee 48-89-2370 from ZenSupply?
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