Abstract: A marker tool and method for use in duplicating a hole pattern from a primary structure into a work piece using a thin generally cylindrical main body member of elastomeric material having two ends, an adhesive coated flange terminating one of the two ends, and a marker element of a strong, hard material centrally embedded in the tool and extending between each of the two ends of the tool, the marker element being of such shape, strength and hardness as to provide an indentation in the work piece to which the tool has been adhered by the adhesive layer when the tool is struck by a hammer, for example.

Abstract: Disclosed is a tool and method for drilling in a work piece a hole pattern duplicating a hole pattern in a base structure. The tools are made of an elastomeric material and comprise a plug-like element having a main body of generally cylindrical shape with a then flat flange at one end. Embedded in the tool is a hard metal marker element extending from adjacent the flange surface to adjacent the opposite end of the tool. The top surface is coated with an adhesive material.