Weiler 56494 Tiger Abrasives Adapting Nuts, For 5/8"-11 Threads, 7/8" Arbor Hole. For use with Tiger, Vortec Pro and High Density Flap Discs. Engineered and manufactured to maximize performance and minimize operating costs in the most demanding surface conditioning applications. The use of superior construction, the highest quality materials and the most stringent manufacturing processes deliver the lowest cost-of-use and most consistent performance in heavy production environments.