Ryobi One P505 18V Lithium Ion Cordless 5 1/2" 4,700 RPM Circular

The Ryobi One P505 cordless circular saw delivers 4,700 RPM of cutting speed in a compact format built around a 5 1/2-inch blade. Designed for portable cutting tasks, it provides cordless mobility for DIYers and woodworkers who already use or plan to adopt the Ryobi 18V ONE+ battery platform.

Line-of-sight visibility is a clear priority in the design. It features a transparent polyurethane lower blade guard alongside a secondary handle positioned on the left side of the tool. This configuration helps you keep both hands in control while maintaining a clear view of your cut line. The handles also feature Gripzone rubber overmolding to increase friction and ensure a secure grasp during use.

For angled cuts, the tool includes an adjustable foot that tilts up to 50 degrees. Power comes from Ryobi 18V lithium-ion batteries, supporting an array of packs including the P100, P102, P103, P104, P105, P107, and P108 models. This broad compatibility makes it easy to power the saw using existing equipment.

As a bare tool, the saw does not include a battery, so you must supply a compatible ONE+ battery separately. It is also limited to the 5 1/2-inch blade platform rather than larger full-size circular saw blades, and the listing does not specify whether a blade is included in the box.

Verdict: The Ryobi P505 is a practical choice for anyone invested in the ONE+ cordless system who needs a compact, bevel-capable saw. It offers reliable visibility and solid handling for everyday angled and straight cuts.

• Blade Diameter: 5 1/2 inches
• No-Load Speed: 4,700 RPM
• Bevel Capacity: Up to 50 degrees
• Voltage: 18V
• Lower Guard Material: Polyurethane (transparent)
• Compatible Batteries: Ryobi ONE+ (P100, P102, P103, P104, P105, P107, P108)

A great fit if you:

• Already own Ryobi 18V ONE+ batteries such as the P100, P102, or P108
• Need a compact circular saw that makes bevel cuts up to 50 degrees
• Want clear visibility of your cut line through a transparent blade guard

Consider something else if you:

• Do not own compatible Ryobi 18V batteries and need a complete kit
• Require a tool designed for blades larger than 5 1/2 inches

Does this circular saw come with a battery?
No, batteries are not included with this tool.

Which battery models work with this saw?
It is compatible with Ryobi 18V ONE+ battery models P100, P102, P103, P104, P105, P107, and P108.

What is the maximum bevel angle on this saw?
The foot can be adjusted to bevel up to 50 degrees for angled cuts.