MaterialThis lawn trimmer blade is made of stainless steel, which is stronger and more durable than ordinary plastic. The lawn trimmer replacement blades are finely crafted and have serrated edges, which are better for weeding. Suitable for Ryobi Lawn MowerThis rechargeable metal lawn mower blade is suitable for most lawn mowers on the market, mainly for replacement Product number: RAC158, suitable for Ryobi lawn mower model RAC155 RAC157 RAC158 (compatibility For reference only, please compare the sizes carefully before placing an order.) DimensionsThe lawn mower replacement blade is 85mm long, 20mm wide, with a diameter of 12mm for the large hole and a diameter of 7mm for the small hole. The lawn mower blade is equipped with cutting edge, which can effectively remove weeds and keep the garden tidy, and can cut bushes, weeds, seedlings and anything on the branches. Great for site clearing and other landscaping jobs. Easy to InstallThese lawn mower replacement blades are easy to install and use, no extra tools required, and can be replaced quickly in a few simple steps, allowing you to easily mow your lawn, garden and patio.