1. MaterialThis Trimmer Replacement Blades is made of stainless steel, which is stronger and more durable than ordinary plastic, the blade is finely crafted, and the smooth edge ensures safety. 2. SizeThe cordless trimmer blades are 85mm long, 20mm wide, 12mm diameter for large hole and 7mm diameter for small hole. 3. ApplicableThis cordless lawn mower blade is suitable for most lawn mowers on the market, FRT18A, FRT18A1, Art 46155, FRT20A1, IART 2520 & IAT 20-1M, etc. (The compatibility is for reference only, please compare the size carefully before purchasing.) 4. Easy to InstallThese lawnmower accessory blades are easy to install and use, no additional tools are required, and they can be quickly replaced with just a few simple steps, allowing you to mow your lawn, garden and patio with ease. 5. PackageThe package includes 10 pieces of lawn mower blades, enough for you to use and replace. High quality blades make cutting easier! RosyFate Cordless Edger Blades, Grass Trimmer Blade Features: 1. HIGH QUALITY: The lawn mower blades are finely crafted, very durable, have good stability, make cutting faster and more precise, and are very useful cutting accessories. 2. Easy and Safe to Use: The metal trimmer blades are very easy to change, even for a beginner, it can be done in 1 minute. Its design makes it safer to use. Product Specifications: Name: Lawn Mower Blade Material: Stainless Steel < p>Size: length 84 mm, width 20 mm, large hole diameter 12 mm, small hole diameter 7 mm. Compatible models: FRT18A, FRT18A1, Art. 46155, FRT20A1, IART 2520 & IAT 20-1M...(The compatibility is for reference only, please compare the dimensions carefully before purchasing.) Package: 10 x Replacement blades for cutter border