Foredom Cobalt Steel Twist Drills, #50 to #80, 10-Pks
Handling 7-10 business days
#50 (A-8350), #51 (A-8351), #52 (A-8352), #53 (A-8353), #54 (A-8354), #55 (A-8355), #56 (A-8356), #57 (A-8357), #58 (A-8358), #59 (A-8359), #60 (A-8360), #61 (A-8361), #62 (A-8362), #63 (A-8363), #64 (A-8364), #65 (A-8365), #66 (A-8366), #67 (A-8367), #68 (A-8368), #69 (A-8369), #70 (A-8370), #71 (A-8371), #72 (A-8372), #73 (A-8373), #74 (A-8374), #75 (A-8375), #76 (A-8376), #77 (A-8377), #78 (A-8378), #79 (A-8379), #80 (A-8380).
For use in small pin vise and other hand tools that hold wire gauges or in rotary handpiece with A-MC2 and A-M50 micro chucks. Order by wire gauge.
20,000 RPM Maximum Speed
Cobalt steel are high-speed steel that contains more cobalt. They hold their hardness at much higher temperatures and can be used to drill stainless steel and other hard materials. Because they are very hard, they can be slightly brittle so it makes sense to offer them in packs of ten.
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