PFERD WRC Cylindrical shaped felt point with radius end is points of choice for minor concave and convex contours. Specification: 1 x" Diameter (D) 1-1/4" Length (T); 1/4" Shank Diameter x 1-5/8" Shank Length; Recommended Speed RPM, 4000 - 8000; Maximum Speed 19000 RPM.