6338DSB

For sale is a 29pc set of Mac cobalt drill bits. The bits are in good used condition. a few of the bits were swapped out with Snap On cobalt bits, see pics for details. 

All included bits are made of Cobalt steel (HSCO). Cobalt bits are used for drilling hardened tool steel. if you’ve ever tried to drill hardened steel (like that of a wrench or saw blade), you’ll know that standard HSS drills just won’t get the job done before overheating and dulling, or even straight up cracking. That’s where Cobalt drills come in handy. With a steady hand and even pressure, these cobalt bits can drill through the hardest, highest grade steels in your shop.   

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