Weiler 07756 DRIVE ARBOR 1/4"-20 TO 1/4" - For 1/4"-20 Mounted Flap Wheels, Adapts a 1/4-20 thread to a 1/4 in stem. Suitable for use with Die Grinder, Drill and Right Angle Die Grinder. Specifications: 1/4-inch to 20 Thread Size, 1/4-inch Adapted Size, Pack of 5. Drive arbor is to be used with Weiler flap wheels only. 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.