hole saw 8pc hole saw set material: M3 bi-metal hole saw8pc hole saw setmaterial: M3 bi-metalIt can be used in portable electric or pneumatic tools,vertical drill machines,lathe,boring/milling machines and other machine tools.6PC Hole Saws: 3/4” (19mm), 7/8” (22mm), 1” (25mm), 1-1/8” (29mm) 1-1/4” (32mm), 1-1/2” (38mm)1PC Arbor: YF-10A-3071PC Adapter: YF-10A-324