Tungsten carbide drill bits

-45hrc 55hrc 60 hrc
-ship out within 1days
-competitive price for drill bits
Description

Tungsten carbide drill bits :

Size: Dia 1mm -20mm 
Tolerance :H5 H6
Special designed chip groove excellent chip removal properties 
Coating /un-coating 
Functional :
Gray iron ,ductile cast iron ,stainless steel ,strucutral steel ,alloy steel and other common materials ,precise centering ability which enables to gain stable dimensional accuracy and fine surface ,suitable for process system with excellent rigidity .