The unique Bullseye Magnetic Cap, used for insert size identification, simplifies board manufacturing control and reduces scrap by creating a dramatic ring on the board surface when it is dusted with Detection Powder, indicating the exact position for drill-out.  Any color cap can be supplied, and Detection Powder is available in white or black.  (Any fine iron powder will work.)   Caps are also available in plain mylar (but without Bullseye capability), and all caps are available in strip form for customer application.

(Patent # 6,460,239)

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