Title: dont buy!
Product review: I just drilled 30 holes in 17 gauge hot rolled steel (soft steel) and 3 of the drill bit diameters I used resulted in both chipped and crushed cutting edges. To top things off the shafts on all three of the bits are soft as well and the jacob chuck clamp created grooves on the shaft 1/32" of an inch deep. The bits wont even go back in their cheap plastic cartridges because of the mangled shafts. I am looking to replace them with higher quality steel alloy bits asap.
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