Material: The hair clipper replacement blades are made of plastic. The lawn mower replacement blades are finely crafted and have serrated edges, making them more suitable for weeding. Dimensions: The lawn mower replacement blade is 66mm long, 19mm wide, large hole diameter 11mm, small hole diameter 6mm. EASY TO INSTALL: These lawn mower lawn mower replacement blades are easy to install and use, do not require any additional tools, and can be quickly replaced in a few simple steps, allowing you to easily mow your lawn, garden and patio. Packaging: The package contains 8 replacement lawn mower blades, enough for you to use and replace. High-quality blades make cutting easier.