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high speed steel twist drill bits, roll-forged
em No.：YEYI-4001
Description:
hot roll-forged flute with special heat treatment gives additional toughness with increased durability of the drill bit.
118 degree point angle design for general purpose.
black oxide finish for greater resistance to wear.
economical high speed steel bit for general drilling.
for drilling in steel, cast steel, malleable iron, sintered metal, non-ferrous metal and plastic.
em No.：YEYI-4001
Description:
hot roll-forged flute with special heat treatment gives additional toughness with increased durability of the drill bit.
118 degree point angle design for general purpose.
black oxide finish for greater resistance to wear.
economical high speed steel bit for general drilling.
for drilling in steel, cast steel, malleable iron, sintered metal, non-ferrous metal and plastic.