material: M35 (Co 5%)
surface finish:amber, bright,titanium coated,black&bright finish,amber,amber&black,amber&bright.
manufacture process: fully ground,
point angle: 135,118,130,multifork,
shank: straight shank,reduce shank,tri-flat shank，
M35 cobalt drill is the best quality hssco drill bits,about point angle,normally ,client like 135 split
point,but multifork point can increase drill's quality too much ,
and tri-flat shank make drills can be gripped more strongly,avoid smooth.
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