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Claim 1

A DEVICE OF THE TYPE DESCRIBED COMPRISING A ONEPIECE BODY MEMBER OF TOUGH RESILIENT PLASTIC MATERIAL INCLUDING A SHANK INSERTABLE INTO AN APERTURED WORK STRUCTURE AND ENLARGED LATERALLY PROJECTING AND PERIPHERALLY CONTINUOUS HEAD MEANS INTEGRALLY JOINED WITH A TRAILING END OF SAID SHANK AND ENGAGEABLE WITH ONE SIDE OF THE WORK STRUCTURE, APERTURE MEANS EXTENDING AXIALLY THROUGH SAID HEAD MEANS AND AXIALLY INTO SAID SHANK AND PROVIDING SLOT MEANS EXTENDING THROUGH SAID HEAD MEANS AND IN SAID SHANK, SAID SLOT MEANS INCLUDING AT LEAST THREE ANGULARLY OFFSET SECTIONS OF PREDETERMINED RADIAL EXTENT SUBSTANTIALLY OPENING AT ANGULARLY AND SUBSTANTIALLY EQUALLY PERIPHERALLY SPACED SIDE PORTIONS OF SAID SHANK, SAID SLOT MEANS SECTIONS EXTENDING AXIALLY THROUGH SAID HEAD, SAID SLOT MEANS SECTIONS CONVERGING FROM SAID SIDE PORTIONS TOWARD A CENTRAL LONGITUDINAL AXIS OF SAID DEVICE AND JOINING EACH OTHER CENTRALLY OF SAID DEVICE, EACH OF SAID SLOT MEANS SECTIONS BEING DEFINED BY GENERALLY LONGITUDINALLY EXTENDING OPPOSED SURFACES WHICH CONVERGE WITH RESPECT TO EACH OTHER TOWARD AN ENTERING END OF SAID SHANK, AND PIN MEANS INSERTABLE INTO SAID APERTURE MEANS THROUGH SAID HEAD MEANS AND THEN INTO SAID SHANK AND INCLUDING AT LEAST THREE SECTIONS INSERTABLE THROUGH SAID HEAD MEANS AND INTO ALL OF SAID SLOT MEANS SECTIONS, SAID PIN MEANS SECTIONS BEING COMPLEMENTARY TO AND WIDER THAN SAID SLOT MEANS SECTIONS FOR POSITIVELY SPREADING SAID SURFACES AND EXPANDING THE SHANK FOR ENGAGEMENT WITH THE WORK STRUCTURE FOR RESISTING WITHDRAWAL OF THE SHANK FROM THE WORK STRUCTURE, SAID PIN MEANS SECTIONS HAVING SUBSTANTIALLY THE SAME RADIAL EXTENT AS SAID SLOT MEANS SECTIONS.

Claim 2

A DEVICE OF THE TYPE DESCRIBED COMPRISING A ONEPIECE BODY MEMBER OF TOUGH RESILIENT PLASTIC MATERIAL INCLUDING A SHANK INSERTABLE INTO AN APERTURED WORK STRUCTURE AND ENLARGED LATERALLY PROJECTING AND PERIPHERALLY CONTINUOUS HEAD MEANS INTEGRALLY JOINED WITH A TRAILING END OF SAID SHANK AND ENGAGEABLE WITH ONE SIDE OF THE WORK STRUCTURE, APERTURE MEANS EXTENDING AXIALLY THROUGH SAID HEAD MEANS AND AXIALLY INTO SAID SHANK AND PROVIDING SLOT MEANS EXTENDING THROUGH SAID HEAD MEANS AND IN SAID SHANK, SAID SLOT MEANS INCLUDING AT LEAST THREE ANGULARLY OFFSET SECTIONS OF PREDETERMINED RADIAL EXTENT SUBSTANTIALLY OPENING AT ANGULARLY AND SUBSTANTIALLY EQUALLY PERIPHERALLY SPACED SIDE PORTIONS OF SAID SHANK, SAID SLOT MEANS SECTIONS EXTENDING AXIALLY THROUGH SAID HEAD, SAID SLOT MEANS SECTIONS CONVERGING FROM SAID SIDE PORTIONS TOWARD A CENTRAL LONGITUDINAL AXIS OF SAID DEVICE AND JOINING EACH OTHER CENTRALLY OF SAID DEVICE, EACH OF SAID SLOT MEANS SECTIONS BEING DEFINED BY GENERALLY LONGITUDINALLY EXTENDING OPPOSED SURFACES WHICH CONVERGE WITH RESPECT TO EACH OTHER TOWARD AN ENTERING END OF SAID SHANK, AND PIN MEANS INSERTABLE INTO SAID APERTURE MEANS THROUGH SAID HEAD MEANS AND THEN INTO SAID SHANK AND INCLUDING AT LEAST THREE SECTIONS INSERTABLE THROUGH SAID HEAD MEANS AND INTO ALL OF SAID SLOT MEANS SECTIONS, SAID PIN MEANS SECTIONS BEING COMPLEMENTARY TO AND WIDER THAN SAID SLOT MEANS SECTIONS FOR POSITIVELY SPREADING SAID SURFACES AND EXPANDING THE SHANK FOR ENGAGEMENT WITH THE WORK STRUCTURE FOR RESISTING WITHDRAWAL OF THE SHANK FROM THE WORK STRUCTURE, SAID PIN MEANS SECTIONS HAVING SUBSTANTIALLY THE SAME RADIAL EXTENT AS SAID SLOT MEANS SECTIONS.