Rodman’s 82° cobalt 6-flute countersink will handle more heat and abrasion than high-speed steel countersinks, these have better performance on hard-to-machine materials, and allow users, easy, free cutting, and clean stock removal with a surgical clean smooth-cut as well as deburring applications. Our patented M7 alloy stands the test of time, are easily resharpened, and out-perform all others on the market. We offer a 6-pc set as well as individual sizes.