Bosch HB100 1 In. Bi-Metal Hole Saw Progressor tooth design cuts faster and lasts longer in wood and metal applications Reinforced shoulder for added strength and longer life 8 percent cobalt alloy for longer life and higher heat resistance Works with standard or Quick Change mandrels (Quick Change requires adapters) 1-Inch Wood cutting Quick change Use on: Natural wood; hardwood; plywood; woodcore plywood; chipboard--raw, veneered and laminated; fiber-reinforced composites; sandwich materials; plastics; thin sheet metals. Use Bosch Adapter: AN01