Harrier 56 Petrol Variable Speed Mower with Electric StartThe Harrier 56 is our largest pedestrian rear roller rotary lawn mower. With an impressive 53cm rear roller, it's the widest in its class and ideal for lawns up to 1000 square metres (approximately the size of a 5 a side football pitch). This auto drive lawn mower uses an intuitive Sens a Speed system to adjust the drive speed to your walking pace (1. 0 2. 9mph) and the hassle free InStart push button electric starter means you can say goodbye to pull