Walk-Behind Self-Propelled Lawn Vacuums suction up-then grind up-leaves, seeds, mulch, blooms, branches, litter, and debris from not only the lawn, but also garden, driveway, and other soft and hard surfaces. Makes/models have variable forward/reverse gear speeds and adjustable vacuuming heights (some with adjustable handlebar heights as well). Depending on make/model, the pick-up swath varies from 25 to 29 inches wide as does bag capacity and emptying method. Vacuum hose kits for sucking up debris in hard-to-reach places and on-board chippers for shredding branches up to 2 inches in diameter are standard on some machines, optional on others.