BUSHING SET Includes a 5/8" 4-Point, a 5/8" 9-Point and a Cup Chisel in an attractive wood box. Progress from coarser to finer texture in your stone. Highest quality carbide blades last and last. Attractive box stores and proctects your tools. Use with Trow & Holden pneumatic hammers. Will fit 1/2", 3/4" or 1" piston sizes. Save money by buying as a set!