Accommodates Different Spline Sizes Finished Wood Handle with Countour Grip This CRL Nylon Concave Edge Roller is for retainer spline installation. It has a nylon ball bearing roller riveted to a steel yoke. The finished hardwood handle has a contour grip. Roller Diameter: 2 in (51 mm) Roller Thickness: 3/32 in (2.4 mm) Minimum Order: 1 Each