It's our pleasure to know such information as below:

1)Size or Dimension:Diameter,Total Length,Flute Length,etc;

2)Standard:DIN,ASME/ANSI/ISO,etc;

3)Material: M2(1.3343),M35,M42,M2AL,W9(9341),4341,4241,etc;

4)Treatment:Ti coating,fully ground,milled,black,etc

5)Concrete Using:drilling in steel,wood,concrete,...etc

6)Any other information you want to know.

The quality of our Center drills is the highest In China ,Our factory produce the HSS center drills  the most professionally,Of course ,You can test the quality of  the Center drills ,It has been recognized and taken a fancy to our many clients . Radius Type DIN 333 Form R  ,Right Hand,size 0.5mm-6.3mm;APPLICATIONS:Designed to reduce the bearing of the center hole and provide a protected centering seat while reducing the risk of breakage . Plain Type Imperial,60 degree & 90 degree Included Angle Right,Drill DIAMETER ,APPLICATIONS:Designed to maintain accurate center holes on long production runs ,or when precise centering is required.    Bell Type Imperial 60 degree & 90 degree Included  Angle Right ,Drill DIAMETER 3/64-3/8.