One each Left Hand and Right Hand replacement blades for Bush Hog Brand model HGM disc mowers. Fits Models HGM7, HGM8, HGM9 and HGM10 mowers . Blades measure 108mm long X 40mm wide, 4mm thick and have a 21mm mounting hole. Featuring dual cutting edges these blades can be flipped over for extended life. Sold by the pair, one left hand and one right hand, just change the quantity ordered to meet you needs