Easy recognition for Centering Drilling

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Center Drills, Centering Tools Standard (Screw Threads, Center Holes)

I noticed a description "JIS B 0041-B2.5/8" on a drawing.
Can you tell me what kind of tool I should use?

The term "JIS B 0041" defines a simplified illustration method of how to
create center holes. It basically means a B shaped Center Drill size φ2.5 should be used. However, please refer to the following guidelines and recheck the drawing as the JIS B 0041 specification have very detailed regulations.

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