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For most woodworkers, the DeWalt 20V MAX 3-inch Cut-Off Tool (DCS438) is the best DeWalt cutoff tool to buy: it balances portability, useful cutting depth, and compatibility with several 3-inch wheel types. Choose the 4.5-inch angle grinder instead when deeper cuts matter more than compact handling, or a corded grinder when you need sustained power without managing batteries.
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DeWalt cutoff tool options at a glance
DeWalt’s compact cutoff tool is purpose-built for small, controlled cuts. Its larger angle grinders can cut the same kinds of materials with larger wheels and more depth, but they are bulkier and less convenient for tight spaces. The figures below are manufacturer specifications; battery runtime varies with material, wheel, battery condition, and cutting technique.
| Tool | Power | Wheel size | Maximum cut depth | Weight | Best fit |
|---|---|---|---|---|---|
| DeWalt DCS438 3-inch Cut-Off Tool | 20V MAX battery | 3 in | 7/8 in | 2.9 lb bare tool | Trim, sheet goods, tile, metal, and tight-access cuts |
| DeWalt DWE402 4.5-inch angle grinder | 11-amp corded | 4.5 in | Not specified as a single universal figure | 6.2 lb | Deeper cuts and longer work near an outlet |
| DeWalt DCG413 4.5-inch angle grinder | 20V MAX battery | 4.5 in | Not specified as a single universal figure | 4.2 lb bare tool | Cordless grinding and cutting with a larger wheel |
Cut depth depends on the wheel’s radius, guard, and tool geometry, so do not treat wheel diameter as usable depth. The DCS438’s stated 7/8-inch depth is particularly useful for judging whether it can pass through a workpiece in one cut. A 4.5-inch grinder generally reaches farther, but check the intended material, guard, and accessory instructions rather than assuming it can cut through any stock of a given thickness.
Which model should you buy?
Choose the DCS438 for compact, occasional cuts
The DCS438 is the most direct answer if you searched for a DeWalt 20V cutoff tool. Its small wheel and light bare-tool weight make it easier to guide in narrow spaces than a full-size grinder. It suits trimming metal hardware, cutting small sections of pipe or threaded rod, scoring tile, and making short cuts in sheet material. For woodworking, it can be handy for incidental material cuts or project hardware, but it is not a substitute for a circular saw, jigsaw, or track saw on ordinary lumber.
Its 3-inch wheel limits both depth and the size of the work it can tackle efficiently. If your cuts are routinely close to or beyond 7/8 inch deep, you may need to cut from both sides, reposition the work, or step up to a larger tool. Those extra steps can make a compact tool a poor choice for repetitive production work.
Choose a 4.5-inch grinder for reach and heavier work
A corded DWE402 is the practical pick for frequent cutting or grinding at a fixed bench or jobsite with reliable power. It avoids battery changes and offers a larger wheel, but its cord affects maneuverability and can snag around a workpiece. The cordless DCG413 preserves mobility while accepting a 4.5-inch wheel; expect a larger, heavier setup than the DCS438, especially once a battery is attached.
These grinders are more versatile for general metalwork, but they are not automatically better for precision. Larger, faster-running wheels can remove material quickly and are less forgiving in small cuts. For woodworking shops, keep abrasive cutting well away from sawdust and combustible finishes, and use the correct guard and accessory for the operation.
Wheel compatibility: check before buying
The DCS438 accepts 3-inch accessories designed for that tool, including compatible cutting and abrasive wheels. DeWalt specifies a 3/8-inch arbor and a maximum speed of 20,000 rpm for the DCS438. A wheel that is the right diameter can still be incompatible if its arbor, speed rating, or intended use is wrong. Never force an arbor fit or use a wheel rated below the tool’s operating speed.
Likewise, 4.5-inch grinders use accessories matched to their spindle, guard, and maximum speed. A 3-inch cutoff wheel is not a safe way to make a larger grinder behave like the DCS438 unless the tool and accessory manufacturers explicitly approve that setup. Follow the manual for flange orientation, guard position, and wheel type; cutting wheels and grinding wheels are not interchangeable.
Runtime: estimate the job, not just the battery size
DeWalt does not provide a single dependable runtime figure for the DCS438 because cutting load changes so much between thin sheet metal and dense tile. As a practical planning guide, a compact cordless cutoff tool is better suited to short cuts and intermittent work than to continuous production. A larger-capacity 20V MAX battery generally provides more work between charges than a compact pack, but it also adds weight and can make the tool less nimble.
For example, if a project involves 30 short cuts with pauses to reposition the material, runtime may be less of a concern than if you are making long, uninterrupted cuts through thick stock. If you already own DeWalt 20V MAX batteries, the DCS438 bare tool can be an economical addition. If you need a battery and charger as well, compare the full kit cost with a corded grinder when the work will happen near an outlet.
Match the tool to your situation
| Your situation | Better starting choice | Why |
|---|---|---|
| Occasional small cuts; limited storage | DCS438 | Compact body and 3-inch accessories are easier to store and maneuver |
| Already own DeWalt 20V MAX batteries | DCS438 or DCG413 | Choose by required cut depth and wheel size, not battery platform alone |
| Frequent cuts at a stationary bench | DWE402 corded grinder | No battery swaps; larger wheel is better for sustained, heavier work |
| Need cordless mobility and a larger wheel | DCG413 | More reach than the compact cutoff tool, with battery-powered portability |
| Mostly cutting wood for furniture or cabinetry | A saw suited to the cut | Cutoff wheels are generally not the right choice for routine lumber sizing |
Handling, safety, and ownership
The DCS438’s low bare-tool weight helps with one-handed positioning, but the battery changes the balance. Support the work securely and keep both hands in control whenever the manual calls for it. A cutoff wheel can bind if the cut closes or the tool twists; let the wheel reach operating speed, keep it aligned, and avoid pushing hard to compensate for a dull or wrong accessory.
Consumables are the main recurring cost. Thin abrasive cutoff wheels wear down and can be damaged by side pressure, while diamond wheels are intended for compatible applications and still need correct handling. Inspect wheels for cracks, chips, warping, or other damage before use, and replace them rather than trying to stretch a worn or suspect accessory. After work, clear dust from vents and the guard area with a method allowed by the manual. Fine dust and abrasive debris can shorten tool life, and cutting metal near sawdust creates an avoidable fire risk.
Prices vary by retailer, kit contents, and promotions. As a general market guide, compact cordless bare tools often fall around $100–$200, while 4.5-inch grinders commonly range from roughly $60–$180; cordless kits can cost more once batteries and a charger are included. Confirm current specifications and included accessories before purchase, since packages can differ.
Bottom line
Buy the DCS438 if portability, small cuts, and access to tight areas are your priorities—and its 7/8-inch maximum depth covers your typical work. Pick the DCG413 when you want cordless freedom but need a larger 4.5-inch wheel, or the corded DWE402 for repeated heavy work near power. If most of your projects involve cutting wood to size, invest in a saw designed for wood instead of asking a cutoff tool to do that job.