Patent ID: 8297891

Claim:
A drill-and-hole detector tool comprising at least two plates ( 1 a and 1 b ) wherein the first plate ( 1 a ) possesses at least three passing holes ( 2 b ) at one end and a chimney ( 3 ) which is used as a drill guide at the other end, and the second plate ( 1 b ) possesses at least three studs ( 2 a ) at one end and a positioning rivet or stub ( 4 ) at the other end, in such a way that when the two plates ( 1 a and 1 b ) are superimposed, the three passing holes ( 2 b ) of the first plate ( 1 a ) coincide with the three studs ( 2 a ) of the second plate ( 1 b ), and the chimney ( 3 ) of the first plate ( 1 a ) coincides with the positioning rivet or stub ( 4 ) of the second plate ( 1 b ), wherein the first plate ( 1 a ) further comprise at least one additional hole ( 9 ) and a screw ( 10 ), said hole ( 9 ) being located in the middle of the three passing holes ( 2 b ) and threaded.