models
Milwaukee 4274-21: Permanent Magnet & 1-5/8-Inch Capacity
The 4274-21 combines a corded motor with a permanent magnetic base and a quarter-turn partial-magnet positioning mode. Loss of motor power is therefore not the same attachment event as on the electromagnetic 4272-21, but the design does not self-approve thin, coated, curved or poorly contacted steel. No exact 4274-21 Amazon offer is retained.
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Offers later on this page are clearly labeled alternatives, not the model discussed in this guide.
Permanent magnet changes positioning and power loss
Milwaukee's current package list includes the drill, safety strap, lubrication spray bottle, chuck key, carrying case, a 3/4-inch-Weldon-to-1/2-inch-chuck adapter and two one-inch retractable pilot pins. The page's 'strongest hold on 1/4-inch steel' wording is comparative marketing, not blanket approval for every 1/4-inch workpiece.
- Power: 120V corded; confirm unit nameplate
- Annular diameter: 1.625 inches maximum
- Cutting depth: Not confirmed for this guide
- Speed: 475/730
- Cutter interface: 3/4-inch Weldon quick-change
- Base: permanent
Compare setup behavior before cutting claims
Treat the permanent magnet as a setup characteristic, not an all-purpose recommendation. It changes what happens to magnetic attachment when motor power is interrupted, but the work still needs suitable steel and the prescribed restraint. Compare this model with both the electromagnetic 4272-21 and a cordless permanent-magnet drill if cable access is also a concern.
If the job requires frequent positioning on steel structures, compare the manufacturer's partial-magnet positioning feature with how you normally align holes. The benefit is a workflow question, not a claim of faster cutting. Obtain a demonstration or inspect the controls where possible, especially if the operator must reach them in a constrained position.
Compare a documented alternative
This Amazon offer is for Milwaukee M18 FUEL 2787, not the source-only model discussed in this guide. Compare it only as a different model and verify its own capacity, power, cutter system and package.
Compare this alternative at AmazonThe 1/4-inch statement has conditions
The marketing statement about holding on 1/4-inch steel is conditional, not a guarantee on every painted, curved or thin workpiece. Obtain the exact US manual before approving a setup at the minimum thickness. Also keep its 1-5/8-inch annular capacity separate from chuck capacity for ordinary drill bits.
Questions, answered
Will the 4274-21 magnet remain engaged without electrical power?
Milwaukee says its permanent base operates independently of electrical power. That does not remove the need for correct engagement, suitable steel and the required restraint.
