Uni-que locking structure, new design, give you a better using experience. Suitable for angle grinders and cutting hines with 1200W speed of 11000r/ min and 125 polishing plate diameter, has wide applications. These lock nuts require the M14 connecting thread, please check before ordering. Made of high-grade steel , has a long service life, so you don’t need to change it often. You can change it yourself, which can save your time and money. < p>Features: Material: 45# steel ∮D: 50mm Package size: 454520mm/1.8 * 1.8 * 0.8in Package weight: 110g / 3.9ounce