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drill bits material: M35 (Co 5%)

drill bits surface finish:amber, bright,titanium coated,black&bright finish,amber,amber&black,amber&bright.

drill bits manufacture process: fully ground,

drill bits point angle: 135,118,130,multifork,

drill bits shank: straight shank,reduce shank,tri-flat shank， 

drill bits with M35 cobalt 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.