ABS material: The blade of the lawn mower is made of high quality ABS plastic, which features high stability, safety and reliability.Compares other metal blades, The plastic blade does not rust easily and the cut is more precise. / p> Good compatibility: The plastic blade has a length of 83mm, a large hole of 12mm and a small hole of 7mm. It fits most lawn mowers and is a perfect replacement for metal knives for garden lawn mowers. Easy installation: This plastic blade is easy to install and replace.The sturdy blade is perfectly integrated with the round handle, which provides good stability, safety and reliability. You can easily prune the vegetation in the garden. (Note: The plastic knife lawn mower cannot cut hard objects such as wood or stone while working). Package contents: The replacement knife set contains 50 replacement blades, which is enough to meet your replacement needs, so you don't have to buy blades repeatedly. We make every effort to provide the best customer service, if you have any questions about the product, please email us, we will reply to you within 24 hours and give you a satisfactory result.