19 PIECE DRILL BIT SET (118 DEGREES) BLACK OXIDE FINISH
19 PIECE INDUSTRIAL GRADE 118 DEGREE DRILLBIT SET WITH BLACK OXIDE FINIISH
1/16, 5/64, 3/32, 1/8, #29, #25, 5/32, #21, 3/16, #7,7/32, 1/4, F, 5/16, U, 3/8, 27/64, 7/16,1/2 IN A RUGGED METAL CASE
Black Oxide – Applied to high speed steel bits with an added heat treatment that reduces friction between bit and workpiece. Black oxide bits have 50% longer life than standard high speed steel bits.
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