Abstract: An assembly screw having a deep driver tri-drive head configuration which in use transmits a high improved torque application. The head configuration has a slot configuration, Phillips recess and Robertson square drive recess which are significantly deeper than industry standards.

Abstract: A fuse extractor and puller including a generally cylindrical fuse receiving portion, a lifting and inserting tower attached to the cylindrical fuse receiving portion, and a gripping head attached to the tower and having specially molded characters etched thereon. The tower portion of the fuse puller is hollow and incorporates a continuity detector having an indicator for indicating the condition of a fuse comprising a light extending through the top of the gripping portion, and first and second spring contacts attached to the continuity detector, adapted to contact the electrical terminals of a fuse positioned within the puller. The tower further includes a cantilevered support for supporting the continuity detector so that the light may be pressed downwardly against the gripping portion and the stress created thereby is absorbed, preventing damage to the light.