The WG588 puts the biggest mulch ratio in this guide behind a toolless blow-to-vac switch: 20 bags of leaves become one. That is achieved by a triple-layer metal impeller, which is the part that decides how finely the leaves are chopped and how well the machine resists twigs. It also lists 600 CFM and 100 MPH from a brushless motor.
The 100 MPH figure is modest, so it is better at collecting than at lifting stuck leaves, and the best use is a lawn of dry leaves that you want to shrink. Compared with the WG583 at 340 CFM and 210 MPH, it moves far more air but is slower, which tells you the two tools are built for different jobs.
Because a mulching impeller is a tough job for a battery, expect the pack to drain faster in vacuum mode than in blower mode. Use a large 40V pack and empty the bag often. Clear the impeller of wrapped stems with the battery out.
What works
- 20:1 mulch ratio, the highest listed
- Triple-layer metal impellers
- 600 CFM from a brushless 40V motor
- Toolless switch between blow and vacuum
Watch out for
- 100 MPH is modest for stuck leaves
- Vacuum mode drains the pack quickly
Spec sheet
- Platform
- 40V Power Share
- Airflow
- 600 CFM
- Air speed
- 100 MPH
- Mulch ratio
- 20:1
- Impeller
- Triple-layer metal






