Lawn mowers with 2-tooth blade

Bladed knife

— a knife in the form of a pair of blades, rotating around a vertical axis in the manner of a propeller blade. Two blades — the most popular, almost standard option for rotary-type lawn mowers. Note that in the case of trimmers, the use of a knife allows you to achieve higher productivity and better cope with thick grass than using a line reel. On the other hand, blades do not tolerate contact with stones and other hard objects very well; in case of such troubles, various tricks can be provided (for example, an automatic engine brake).