What's inside
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For trimming a door jamb so new flooring can slide underneath, both the DeWalt DCS356 and Bosch GOP18V-34 can make the cut. The better choice depends less on a claimed power advantage than on the battery platform you already own, the blade you fit, and how well you can keep the tool flat against a flooring offcut.
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At a glance
| Detail | DeWalt DCS356 | Bosch GOP18V-34 |
|---|---|---|
| Platform | DeWalt 20V MAX | Bosch 18V |
| Speed control | Dual-grip variable-speed trigger and speed dial | Variable-speed trigger and speed selection |
| Blade interface | Tool-free accessory changes | Starlock interface |
| Best fit | DeWalt owners wanting familiar batteries and broad blade choice | Bosch owners prioritizing the Starlock accessory connection |
| Jamb-cut verdict | Capable, with a suitable flush-cut blade | Capable, with a suitable Starlock flush-cut blade |
Check the exact kit contents before buying: bare-tool and kit versions can differ, and neither tool’s listing guarantees that the blade you need for a jamb cut is included.
What a door-jamb cut demands
The goal is to remove a thin slice from the bottom of the casing and jamb, not to saw through the entire frame. Lay a flooring offcut beside the jamb, add any underlayment that will sit beneath the finished floor, then rest the blade flat on that stack. The offcut sets the cutting height. Make a short, controlled cut and check that the flooring can slide underneath without being pinched.
Most mistakes come from setup, not a lack of tool power. A blade held at an angle can leave a sloped edge; pushing hard can make it wander, overheat, or chatter. If the tool rocks on a soft or uneven spacer, the cut will not match the floor height. Use a stable offcut, keep the blade square to the jamb face, and let the teeth do the work.
DeWalt DCS356: the practical choice for DeWalt owners
The DCS356’s variable-speed trigger and speed dial give useful control for starting a cut gently and adjusting as the blade meets denser wood. Its tool-free accessory change system makes blade swaps straightforward. That matters if a doorway has painted trim, hardwood flooring, or a hidden nail that calls for a different blade.
For a plain wood jamb, fit a flush-cut blade suited to the material. If you suspect nails or screws, choose a blade rated for cutting wood with embedded metal; a standard wood blade can lose teeth quickly on metal. Even a metal-capable blade is not immune to wear. A single missed nail can damage the edge, and continued cutting with a dulled blade tends to increase heat and vibration.
The DCS356 is a sensible buy if you already have DeWalt 20V MAX batteries and chargers. If you do not, compare the cost of the bare tool plus battery and charger with a complete kit; the tool itself is only part of the price. For compatible accessories, browse oscillating-tool flush-cut blades.
Bosch GOP18V-34: the case for Starlock
The GOP18V-34 uses Bosch’s Starlock accessory interface. Its fitted accessories engage through a shaped connection rather than a generic blade mount, helping transmit motion and making the interface itself a meaningful part of the buying decision. Confirm that any blade you buy is compatible with the tool’s Starlock system; ordinary-looking oscillating blades are not automatically a match.
For jamb work, the Bosch offers the same basic advantage as the DeWalt: controlled oscillation in a compact tool that can work close to a floor. The useful comparison is not a promise that one will cut dramatically faster. In wood, blade sharpness, tooth design, pressure, and operator control usually have more influence on the result than small differences in tool specifications.
Choose the Bosch if you already use Bosch 18V batteries or value the Starlock accessory setup and can readily buy the blades you need. If you own neither battery system, compare complete kit prices and local blade availability rather than choosing on brand alone.
Which one should you buy?
For a single doorway, either tool is capable, and buying into a new battery platform may cost more than hiring or borrowing a tool. If you expect to use an oscillating tool for other jobs, such as trimming flooring, removing old caulk, or cutting a small section of drywall, choose the platform you will use most. DeWalt owners have a straightforward reason to choose the DCS356; Bosch 18V owners have the same reason to choose the GOP18V-34.
Without batteries, compare the actual package prices, included accessories, warranty terms, and blade system. Do not pay extra solely for a claimed speed advantage you are unlikely to notice on a few short jamb cuts. If the price difference is substantial and both kits include a compatible blade and battery, the cheaper option is fine for this job.
Making a clean jamb cut
Use a sharp blade and set the floor offcut on the finished-floor side of the jamb. Check that the spacer stack represents the flooring and underlayment thickness accurately; a few millimeters of error can leave the casing either floating above the floor or pressing on it. Hold the tool with two hands if practical, start at a controlled speed, and avoid forcing the blade through the wood.
Stop if the cut suddenly slows, the blade begins to smoke, or vibration changes. Those are signs to check for a damaged blade, a hidden fastener, or a blade that has pinched in the kerf. Do not pry sideways with the blade to clear the cut: that can bend or break it. Once the cut is complete, test the flooring offcut underneath and trim only where it binds. For a job without an existing battery system, compare cordless oscillating-tool kits against local rental options before committing.