This superior quality petrol scarifier from brand leaders Wolf-Garten employs tried & tested scarifying technology to produce excellent results on larger-sized lawns. Its robust build & advanced user features make it particularly suited to the discerning home user or the semi-professional operator. The Wolf UV40B Petrol Scarifier employs a rotating fixed knife system with 34 blades (17 double sided) that allows for gentle yet intensive scarifying resulting in organic matter such as moss & thatch being removed from around the grass roots & any straggly lateral growth being tidied up also. When this layer of thatch & moss is removed, vital nutrients, oxygen & water are able to penetrate into the soil & be absorbed by the grass roots, allowing for much healthier re-growth of the lawn. For best results, your lawn should be scarified every 4-6 weeks, preferably on a dry day, & any moss or thatch brought out of the lawn by the scarifier should be removed by a rake in the first instance & collected subsequently in the optional catcher. Superior features on this model include centrally adjusted, infinitely variable cutting height enabling the very best results to be achieved whatever the conditions. It also has ball bearing wheels making it smoother running & preventing the wheels stiffening with age. For ease of transport & compact storage in your shed or the boot of your car, the Wolf UV40B Petrol Scarifier has handles that are completely collapsible. The soft-grip design of the handles also enhances operator comfort & provides greater control.