Sturdy Material: Made of spring-loaded stainless steel, the lawn mower blade is stronger and more stable than ordinary ABS material. The thickness of the blade is 1.5 mm. The diameter of the hole is 7 mm. Convenient to use: the metal trimmer blades snap into the trimmer and the trimmer is ready to use. When you need to clean grass or weeds, replace the ABS blades with these metal blades. Strong and stable: The replacement metal blade provides safety when cutting. It is very solid and secure. You can safely use it on your lawn or garden. Good Efficiency: Equipped with sharp edges, the replacement blade set effectively removes weeds and keeps your garden clean without cutting or hurt trees. Practical mower attachments: Metal blades are the ideal replacement for lawn mowers and mower blade attachments. It cuts through thick weeds and dense shrubby vegetation.