Specification: Type: Blade Nut Size(approx.): 22mm x 11mm (DxH) Thread: M10x1.25 (LH) Perfect to replace your old or worn one. Fitment:Fits various strimmers with M10x1.25 left handed thread Package Included: 5 x Blade nut (or 1 x Blade nut) Note: Please allow minor error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. No Instructions Included.Professional Installation Is Highly Recommended!