Along with overall build quality, what separates exceptional circular saws from merely adequate ones is power output, measured in amps for corded models or voltage for cordless; cutting capacity, which is how deeply the blade cuts; and bevel capacity, or the angles at which the blade tilts. There’s also an eco setting that reduces power for light cutting while conserving battery life, and six speeds for enough range to make multiple cuts in thin plywood on low to full bore (and maximum blade depth) to cut construction lumber.