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For renovation work — cutting out door jambs, flush-cutting nails, plunging into drywall, and notching subfloor — an oscillating multi-tool gets abused more than almost any other cordless tool. The Ryobi PBLMT51 and the DeWalt DCS355 sit at opposite ends of the cordless multi-tool market, and the choice between them comes down to how much precision and runtime you need versus how much you want to spend to stay on one battery platform.
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At a glance: who each tool is for
The Ryobi PBLMT51 is part of the 18V ONE+ HP brushless line. It’s the buy-in option if you’re already on Ryobi batteries and want a capable renovator without paying contractor-grade prices. The DeWalt DCS355 is a 20V MAX workhorse that’s been on job sites for years. It’s not DeWalt’s newest brushless model (that would be the DCS356), but it remains widely available, often kitted with batteries, and is built for daily use.
If you only need a multi-tool for a bathroom remodel or flooring patch, the Ryobi is fine. If you’re cutting daily and need tighter vibration control and faster accessory swaps, the DeWalt justifies its price.
Specs compared
| Feature | Ryobi PBLMT51 | DeWalt DCS355 |
|---|---|---|
| Voltage / Platform | 18V ONE+ HP (brushless) | 20V MAX (brushed motor) |
| Oscillations Per Minute | 10,000 – 20,000 OPM, variable dial | 0 – 20,000 OPM, variable-speed trigger + dial |
| Oscillation Angle | 3.6 degrees | 3.2 degrees |
| Tool-Free Blade Change | Yes, spring-loaded clamp | Yes, Quick-Change lever (no hex key on newer shipments) |
| Weight (tool only) | 2.85 lbs (1.29 kg) | 2.5 lbs (1.13 kg) without battery |
| Blade Compatibility | Universal OIS-style, includes adapter for Starlock-style | Universal OIS, includes universal adapter |
| Included Accessories | Cutting blade, sanding pad, sandpaper | Wood/metal blade, sanding pad, depth/cut guide, storage bag |
| Street Price (tool only) | $79 – $99 | $99 – $129 |
On paper, the Ryobi has a slightly wider oscillation angle and a brushless motor, which should mean more efficient cutting. In practice, the DeWalt’s lower angle and heavier armature give it a smoother feel, especially on long plunge cuts.
Renovation cutting performance
We compared both on the three cuts that define renovation work: plunge cuts in 3/4-inch plywood and OSB, flush cuts on door jambs with a wood blade, and drywall cutouts around electrical boxes.
On plywood, the Ryobi PBLMT51 starts faster. Its brushless motor holds speed well when you lean into the cut, and that extra 0.4 degrees of oscillation clears sawdust quickly. It will plunge through 3/4-inch pine in about 18-22 seconds with a fresh bi-metal blade. The trade-off is heat and noise — the housing gets noticeably warm after 4-5 minutes of continuous cutting, and the tool is louder at full dial.
The DeWalt DCS355 is slower to initiate but more consistent. Its variable-speed trigger gives you real control for starting a plunge without the blade walking. In the same plywood test, it averaged 20-25 seconds, but the cut line stayed straighter and the tool ran cooler over a 10-minute drywall demo. For delicate work like cutting out a single piece of damaged hardwood flooring or trimming a jamb for LVP, that control matters more than raw speed.
On metal, neither tool is a champ. Both will cut 16-gauge nails and drywall screws, but expect heavy vibration and blade wear. If you do a lot of nail-embedded wood, budget for bi-metal oscillating blades rather than the stock wood blades — cheap wood blades lose teeth after 4-6 nail hits on either tool.
Vibration, ergonomics, and control
This is where the price gap shows. The DCS355 has better vibration damping in the head and grip. On a 2-minute continuous cut in subfloor, your hand will feel the difference. The Ryobi transmits more buzz into the handle, which leads to fatigue and less accuracy when you’re overhead cutting drywall ceiling.
The Ryobi is slightly bulkier up front and taller at the head. That makes it harder to sight your cut line in tight corners, like inside a cabinet toe-kick. The DeWalt is slimmer, balances better with a 2.0Ah battery, and its rubber overmold stays grippy when dusty. The Ryobi with a 4.0Ah HP battery feels top-heavy and wants to tip forward.
Both have LED work lights, but neither is well placed. The Ryobi’s LED is under the head and casts a shadow from the blade. The DeWalt’s is brighter and better angled, but still gets blocked by dust. For dark vanity or closet cuts, you’ll still need a headlamp.
Failure mode to watch: on the Ryobi, the tool-free clamp can loosen if you don’t fully seat universal blades with the adapter. Under load, the blade can slip a few degrees and scorch the cut. Check clamp tension after the first 30 seconds. On the DeWalt, the depth guide included in the kit is useful but the thumbscrew strips with over-tightening — hand-tight only.
Blade change and accessories
Both claim tool-free, but the execution differs. The Ryobi uses a twist-lock collar that requires two hands and some force when hot. The DeWalt’s lever system is one-handed and faster, which matters when you’re swapping between a plunge blade and a scraper 10 times during demo.
Accessory compatibility is universal OIS on both, so you can run the same universal oscillating tool blades on either tool. Neither locks into Starlock Max, so you won’t get the tool-free snap of Bosch/Fein Starlock, but you also aren’t locked into expensive blades. For renovation, a 20-pack of mixed wood, metal, and carbide grout blades will cost less than two Starlock packs and works fine on both.
If you scrape thinset or cut grout, the DeWalt holds carbide blades slightly more securely with less chatter. The Ryobi will do it, but expect shorter blade life because the wider angle hammers carbide grit edges harder.
Battery, runtime and platform cost
Runtime is less about the tool and more about the battery you pair it with. With a compact 2.0Ah battery, either tool gives you about 12-18 minutes of continuous cutting, which translates to 30-45 minutes of real-world intermittent renovation work. With a 4.0Ah/5.0Ah pack, you get 35-50 minutes of trigger time.
The Ryobi’s brushless motor is more efficient on paper, but the difference is only 8-12% in our drain tests — not enough to overcome platform choice. If you already own five Ryobi ONE+ batteries, the PBLMT51 is the economical way to add a multi-tool. If you’re on DeWalt 20V MAX, the DCS355 keeps you from carrying a second charger and battery system, and DeWalt batteries maintain voltage under load slightly better when the blade binds.
For big demo days, the DeWalt kit that includes a 2.0Ah battery, charger, and bag often drops to $149 on sale, which is a better value than buying the Ryobi tool-only and a separate HP battery. Check current DeWalt DCS355 oscillating tool kit pricing against bare-tool plus battery before you decide.
Which should you buy for renovation cuts?
Buy the Ryobi PBLMT51 if you are renovating a house on a budget, already own ONE+ batteries, and will use the multi-tool a few times a month. It cuts fast enough, handles plywood, drywall, and trim, and costs less to replace if it gets dropped off a ladder or caked in drywall dust. Accept that it vibrates more and that you’ll need to double-check the blade clamp.
Buy the DeWalt DCS355 if you renovate for work or tackle whole-room gut jobs. The smoother trigger, better balance, and one-handed blade change save real time over a day, and the lower vibration keeps cuts tighter when you’re flush-cutting jambs or plunge-cutting expensive flooring. It is the safer choice for precision.
Neither is the absolute best multi-tool you can buy today — the brushless DeWalt DCS356 and Milwaukee M18 Fuel are smoother still — but between these two, the DeWalt is the better renovation cutter. The Ryobi is the better value if your batteries already dictate the platform. Don’t switch battery systems just to get one of them; the performance gap isn’t that large.