The ultra-portable and easy-to-handle Worx Nitro WX531L 20V Power Share WORXSAW 4.5 in. Cordless Compact Circular Saw with Brushless Motor might be small, but it’s more than powerful enough to get the job done. With 6900 RPM of no-load speed, it’s able to spin the blade as fast as cordless circular saws that are much larger. The 4.5 in. blade only has a 3/8 in. arbor. That’s half the size of a traditional circular saw’s blade, and it allows the motor to push the blade to higher speeds. And the user benefits from having all that power in an easy to grip and easy to transport form factor. In fact, this compact circular saw weighs less than 4 lbs., so it’s much easier to maneuver and make tricky cuts with than a full-size circular saw.