Material: Made of high quality carbon steel, with high strength, not easy to deform hard drives and other accessories. Quick clamping nut: Adopted anti-skid design, which will not fall off during use. Easy installation: No mounting tools are required, and the installation and removal are quick. Wide range of applications: Compatible with all M14 angle grinders. Package: 2 x Quick Clamping Nut Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.