About This Precise Taper Angle: This 10 degree tapered reamer is designed for proper fitting of ball joints to spindles. The angle is 10 degree. Taper top is 1in. Tip diameter is 1/2in. Taper bottom is 1/2in, which can ream the tie rod taper on the knuckle hole High-quality Steel: Made of 6542 high-speed tool steel, it has high hardness, wear resistance, and high temperature resistance, and can still maintain hardness and stable performance under high-temperature cutting conditions Efficient Cutting: The tapered reamer has a sharp cutting edge, excellent cutting performance, and reduces processing time Wide Applicability: The 1/2" shank design of the ball joint tapered reamer allows for usage in a wide range of machines, making it a versatile addition to any tool kit Easy Usage: The tapered reamer is simple in design, easy to install and operate, even non-professionals can use it easily