The 18" (457mm) Mower Blade is designed for use with the M18 FUEL™ 18" (457mm) Self-Propelled Dual Battery Lawn Mower (M18F2LM18). The 18" (457mm) Mower Blade is a direct replacement for the blade kitted with MILWAUKEE® M18 FUEL™ 18" (457mm) Self-Propelled Dual Battery Lawn Mower. The steel blade offers users maximum durability and life as the precision-machined cutting edges delivers maximum cut quality.