<p><b>Note:</b> Universal trimmer head adapter attachment kit compatible with Stihl, Ryobi, Greenworks and Echo etc different brand trimmer head. The only thing you should check is about the diameter size of attachment kit.<b>Please Do Check The Picture To Confirm The Size Of The Blade Adapter Kit. </b></p> <p> </p> <p><b>Description:</b></p> <p> </p> <p>Brand new, never used, blade adapter attachment kit for Stihl brand string trimmers. </p> <p> </p> <p>Aftermarket part, not OEM stihl trimmer blade kit</p> <p> </p> <p>This is what you need to attach different types of blades to your string trimmer.</p> <p> </p> <p>This Stihl Blade Adapter Kit includes the splined washer, rider plate, collar nut, tune-up / maintenance screwdriver(can also be used for a stop pin needed to hold the head to tighten and loosen).</p> <p> </p> <p><b>Specification:</b></p> <p> </p> <p>Condition: 100% new</p> <p> </p> <p>Material: Plastic + Steel</p> <p> </p> <p>Screwdriver Size: 128 mm</p> <p> </p> <p>Rider plate diameter: 81 mm</p> <p> </p> <p>Collar Nut Diameter: 24 mm</p> <p> </p> <p>Thrust Washer Diameter: 41 mm</p> <p> </p> <p>Other Size as the Picture Shown</p> <p> </p> <p>Manufacturer Part Number: 4126-642-7600, 4126-713-3100, 4126-642-1600</p> <p> </p> <p>Compatible With Stihl String Trimmer blad adapter kit, ompatible With Ryobi and Echo blade cutter attachment</p> <p> </p> <p><b>Package include:</b></p> <p> </p> <p>1 x Thrust Washer</p> <p> </p> <p>1 x Rider Plate</p> <p> </p> <p>1 x Collar Nut</p> <p> </p> <p>1 x Screwdriver</p>