a drill collar position verifier is disclosed for use with a drill bit having a drilling depth control collar positioned coaxially thereon . the drill bit is inserted in a cylindrical opening in a plastic block to a depth determined by the position of the collar . a metallic foil and membrane switch are positioned below the plastic block of predetermined depth and are connected to logic circuitry which is further connected to led indicators . if the drill bit does not protrude through the plastic block , an led is lit to indicate that the collar is positioned too close to the tip of the drill bit . if the drill bit protrudes through the fixture and contacts the foil only , an led is lit to indicate that the collar is positioned within tolerances . and , if the drill bit protrudes through the fixture and contacts both the foil and the membrane switch , an led is lit to indicate that the collar is positioned too far away from the tip of the drill bit .