Product Description: Colour: Gold 45 Carbon Steel Replacement Blades - Suitable For All Models Of Husqvarna Automatic Mowers Application Note: 1. The Blades Are Extremely Sharp, Please Note This When Assembling. 2. If The Cut Looks Uneven And Dirty, It'S Time To Change The Blades. Please Always Exchange All Used Knives For A New Spare Blade 3. We Recommend That You Replace The Screws Directly When Changing The Blades. 4. Flipping The Blade Does Not Make Sense, As The Direction Of Rotation Of Your Robot Lawn Mower Changes Normally. Feature: 1. [Smooth Cutting Image]: Due To The Thickness Of 0.75 Mm And A Weight Of 3 G, The Replacement Blades For Automatic Trimmer Produce An Even And Regular Cut. The Axle Load Is Not Affected By The Slightly Higher Weight 2. [Long Lifetime]: The Blade Set Is Made Of Carbon Steel, Which Guarantees A Long Service Life. The Supplied Screws Are Also Stainless3. [High Security]: The Robotic Replacement Blades For The Automatic Motor Can Not Break The Use Of High Quality Materials. Even If The Blade Encounters Resistance (Stones Or Similar) - Ideal For The Safety Of Animals And Children