Our VIKING 'VM' model lawn mowers (MB 545 VM, MB 650 VM, MB 655 VM), are multi-talented machines. With the grass box in place they give a high quality collected cut - just like a standard rotary mower. Remove the grass box, insert the mulch 'plug' and they are transformed into efficient mulching machines, with grass clippings deposited back into the lawn. Grass cuttings can also be discharged to the rear. The majority of VIKING lawn mowers can be converted to mulchers with an accessory mulch blade and plug kit available.