Morse's premium, bimetal hole saw, has been designed for general purpose applications. Cut wood and metal with the same hole saw. Any machinable metals, up to and including, stainless steel, can be cut with ease and efficiency. Solid caps have the industry standard arbor threads of 1/2"-20 (for holesaws up to 1-3/16") and 5/8"-18, (for holesaws 1-1/4" and above).