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Milwaukee M12 ProPEX Expansion Tool Kit

Milwaukee M12 ProPEX Expansion Tool Kit

4.8· 383 ratings

Best price now

$350.00at eBayVerified

30% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Our take on the Milwaukee M12 ProPEX Expansion Tool Kit

The Milwaukee M12 ProPEX Expansion Tool Kit is a 12V cordless expander for PEX-a plumbing, with an auto-rotating head that lets you expand fittings one-handed. It handles 3/8 in. to 1 in. pipe and comes with 1/2 in., 3/4 in. and 1 in. heads, two batteries and a carrying case. The right-angle body is 7.5 in. long and weighs 4.5 lbs, built for tight spaces. The best new price is $350.00 at eBay as of November 5, 2026, with four stores listing it new.

Best forPlumbers installing PEX-a with expansion fittingsService work in tight crawlspaces and wall cavitiesPros already on the M12 battery platformOne-handed expansion on ladders or overhead
Pros
  • Auto-rotating head allows one-handed expansion
  • Right-angle, compact body reaches tight locations
  • Covers 3/8 in. to 1 in. PEX with three heads included
  • All-metal gears and integrated metal frame
  • Kit includes two batteries and a carrying case
Cons
  • 4.5 lbs is heavy for overhead work
  • 12V platform limits power on the largest 1 in. expansions
  • Only works with PEX-a expansion fittings, not crimp or clamp systems
  • Batteries and heads add cost if you buy spares

Milwaukee M12 ProPEX Expansion Tool Kit prices at every store

  • Home DepotNew

    In stock

    $499.00Observed at 11:13 AM
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  • McCoy's Building SupplyNew

    In stock

    $499.99Observed at 11:13 AM
    Visit store
  • WalmartNew

    In stockSold by Voomi SupplyReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $609.19Free shippingVerified
    Visit store
  • eBayPre-owned

    Availability unknownSold by coyaba (99.5% positive, 15,500 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $300.00+ $26.65 shippingVerified
    Visit store
  • eBayNew

    Availability unknownSold by derlipowertools (99.9% positive, 1,100 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $350.00+ $10.82 shippingVerified
    Visit store

Also available at

  • Ace HardwareCheck price at Ace Hardware
  • Acme ToolsCheck price at Acme Tools
  • Grainger Industrial SupplyCheck price at Grainger Industrial Supply
  • Great Lakes Power ToolsCheck price at Great Lakes Power Tools
  • Max ToolCheck price at Max Tool
  • MSC Industrial SupplyCheck price at MSC Industrial Supply
  • The Milwaukee StoreCheck price at The Milwaukee Store
  • SupplyHouse.comCheck price at SupplyHouse.com
  • Tool NutCheck price at Tool Nut

Milwaukee M12 ProPEX Expansion Tool Kit price history

Lowest price we've seen: $499.00 on Nov 5 at The Milwaukee Store. Tracked across 12 stores since Nov 5.

What reviewers say

Rated 4.8 out of 5 from 383 ratings, owners treat it as a dependable PEX-a expander. The one-handed auto-rotating head and compact right-angle body are the most-cited strengths.

Pros
  • One-handed operation with the auto-rotating head
  • Fits into tight spaces
  • Reliable, consistent expansions
  • Solid Milwaukee build
Cons
  • Weight in overhead use
  • Speed on 1 in. pipe
What people mention
  • One-handed use: PraisedOwners like that the auto-rotating head lets them expand fittings with one hand.
  • Tight spaces: PraisedThe compact right-angle body is cited for reaching tubing in tight locations.
  • Build: PraisedThe metal frame and gears are described as durable.
  • Weight: MixedSome find 4.5 lbs tiring when working overhead.

About the Milwaukee M12 ProPEX Expansion Tool Kit

Our M12™ ProPEX® Expansion Tool 12 V Kit features a built-in auto-rotating head providing you with convenient one-handed operation. The expansion tool features a compact right angle design allowing you to quickly and easily install tubing in tight locations.

Specifications

Tool Type
ProPEX Expansion Tool
Length
7.5 in
Weight
4.5 lbs
Pipe Capacity
3/8" - 1"
Pipe Diameter
1 in
Pipe Size
3/8 In. to 1 In
Pipe Type
PEX
Head Size

Questions and answers

Is $350 a good price for this kit?
It is the best new price among the four stores listing it new as of November 5, 2026. Kits with two batteries and a case usually sit well above the bare tool, so $350 is a fair entry point.
What pipe sizes does it handle?
It expands 3/8 in. to 1 in. PEX-a. The kit includes 1/2 in., 3/4 in. and 1 in. heads.
Does it work with PEX-b or crimp fittings?
No. It is an expansion tool for PEX-a systems with expansion fittings. For PEX-b you need a crimp or clamp tool.
What comes in the kit?
The tool, two M12 batteries, 1/2 in., 3/4 in. and 1 in. expansion heads, and a carrying case.
How does it compare to the M18 version?
The M12 is lighter and more compact for service work. The M18 has more power for sustained 1 in. expansion and larger jobs.
When is it cheapest?
Watch for kit promotions and bare-tool sales in fall and around the holidays. The current low is $350.00 at eBay as of November 5, 2026.
Where is the Milwaukee M12 ProPEX Expansion Tool Kit cheapest?
At eBay, for $350.00, 30% under what the other stores charge, as of our latest check.
What do buyers say about the Milwaukee M12 ProPEX Expansion Tool Kit?
Rated 4.8 out of 5 from 383 ratings.
Where can I buy the Milwaukee M12 ProPEX Expansion Tool Kit?
13 stores we checked sell it, including Walmart, eBay, Home Depot, McCoy's Building Supply, Ace Hardware.

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1", 1/2", 3/4"
Head Type
Auto-rotating head
Material
All-Metal Gears, Integrated Metal Frame
Typical Users
Professional use, Plumbing professional's
Handle Material
Polycarbonate
Handle Type
Right Angle
Handle Length
6.0 in
Strength
Maximum tool durability
Precision
Precise expansion
Size Details
Compact
Usage Type
Expansion
Applications
Expansion
Body Construction
Integrated Metal Frame
Set Contents
Carrying Case
Quantity
2 (batteries)
Case Included
Yes (Carrying Case)
color
BlackSource