Features: -The surface has a unique concave-convex design to improve friction and facilitate installation and removal. -The magnetic design ensures it stays in place during installation and removal, so you don't have to worry about losing it. -Made of high quality chrome vanadium steel material, it is professionally treated to be wear-resistant and have a longer service life. -Its ability to rotate 360° provides greater flexibility and allows access to the most confined areas. -Compatible with multiple car engine models such as N54, N55, R55, R55, R56, R57 and R60. (Note: please check the dimensions before purchasing). .