DeWalt DCS391B
Score: 72/100
Ryobi P505
Score: 74/100Rankings
The Ryobi P505 is a compact, 18V ONE+ cordless 5-1/2-inch circular saw designed for DIY homeowners and light trade users. It features a carbide-tipped thin kerf blade capable of cutting through 2x lumber in a single pass at a depth of 1-9/16 inches. It is best suited for users needing portability and ecosystem compatibility for weekend projects.
The DeWalt DCS391B is a lightweight, cordless 6.5-inch circular saw designed for portability and maneuverability in tight spaces. It features a brushed motor with high RPM but lacks modern safety features like an electric brake. It is best suited for DIY homeowners and light trade professionals needing a portable tool for framing and trim work.
| Attribute | | |
|---|---|---|
6.5 inchesbest | 5.5 inches | |
2.125 inchesbest | 1.563 inches | |
5,150 RPMbest | 4,700 RPM | |
50 degreesbest | 50 degreesbest | |
20 Vbest | 18 V | |
| ↓ lower better | 6.97 lbs | 5.3 lbsbest |
— | 0.375 inchesbest | |
3 yearsbest | 3 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Power & Motor(2) | ||
Voltage (V) | 20 V | 18 V |
Motor Type | Brushed | Brushless |
Performance & Cutting(3) | ||
Blade Diameter (inches) | 6.5 inches | 5.5 inches |
Cutting Depth at 90 Degrees (inches) | 2.125 inches | 1.5625 inches |
No-Load Speed (RPM) | 5150 RPM | 4700 RPM |
Design & Ergonomics(2) | ||
Weight (lbs) | 6.97 lbs | 5.3 lbs |
Handle Type | Side Handle | Rubberized |
Features & Accessories(2) | ||
Spindle Lock | null | true |
Included Blade | false | true |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the DeWalt DCS391B for its speed and portability, noting it is a top performer for maneuverability in light-to-medium tasks. However, experts consistently note that it is outpaced by brushless upgrades and recommend those models for professionals requiring sustained power and efficiency.
Everyday users appreciate the saw's lightweight nature and quick setup for DIY projects like decking and shelving, often praising its smooth performance on standard lumber. Common complaints focus on the lack of modern features like brakes or lights, shorter battery life, and occasional blade binding in dense wood.
Professional reviewers praise the Ryobi P505 for its budget-friendly portability and reliability in light-to-medium DIY tasks. The 4,600-4,700 RPM motor is noted for delivering fast, clean cuts through 2x lumber, rivaling many corded tools. Reviewers recommend the P505 or similar older models to save money over newer variants like the PCL500B, as performance differences are negligible.
Everyday consumers appreciate the Ryobi P505 for its ease of use in home repairs, workshops, and tear-down builds. Users frequently praise the compact 5-1/2 inch blade for its maneuverability in tight spaces and the smooth operation of bevel cuts up to 50 degrees. The seamless integration with the Ryobi 18V battery system is a major highlight.
“Compact and lightweight for easy handling in tight spaces”
“Sufficient power for most DIY wood-cutting tasks, comparable to corded saws”
“Spindle lock position (front-side) less ideal for some users”
