NOTE: It is only compatible with professional 30mm cordless electric pruners, please confirm if it is suitable for your branch shears. HIGH CARBON STEEL SK5: Forged from high carbon SK5 steel which offers excellent performance in terms of strength and rigidity. The blade is designed in a curved shape, sharp and anti-rust. It can cut the tree quickly and will not damage the branches. EASY TO INSTALL: Simply remove the scissors, then use the removal tool from the scissor toolbox to replace the new blade with the worn blade. Please pay attention to safety when replacing the blade. LONG LIFE: The blades are manufactured under strict quality standards from material to final product to ensure this replacement blade performs efficiently for a clean and fast cut when using these blades. LUBRICATION OF THE BLADE: The surface of the blade is coated with grease, which can prevent the blade from rusting, prolong the life of the blade, and make it easier to use.