1977 - Volume #1, Issue #6, Page #23
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Cobalt Drills For Tough Jobs
New heavy-duty drills made of cobalt high speed steel are designed to handle the really tough drilling jobs.
Introduced by Kar Products, they feature a 135? split point eri i which gives them a firm, instant "bite" without center punching and without the usual wandering you get with conventional drills, particula..........


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1977 - Volume #1, Issue #6