4 of these bits broke about 1/3 inch from the cutting edge. There were no chips either, the material liked to roll over the drill bit. Bit geometry is said to be poor and I wasn't impressed with mostly pretty junk.
π Suppliers of Tungsten Carbide Cutter Inserts
3 Review
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431 CNMG 331 TNMG WNMG
Excircle Indexable MTJNR1616H16 MWLNR1616H08 MCLNR1616H12
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