That's what I had to buy. The drilled acetylene tip did kinda sorta work but not enough gas to heat well enough. The counter sunk end kept it from blowing out so bad. The two short cuts on the checker plate were from the drilled tip, the long cut was from the propane tip in about a tenth of the time. If I'da drilled the side holes it should have worked better.. Oh well here's to knowledge.. Thanks for the input.