Abstract: A hook reciprocable between a recessed inoperative position and an exposed operative position and comprises a housing formed with a cylindrical side wall which has an open exterior end and an interior end with a circular end cap enclosing the side wall at the interior end to define a cylindrical opening therebetween. A flange extends radially outwardly from the open exterior end. A pair of apertures are formed through a central axial extent of the side wall at diametrically opposed locations and exteriorly facing marking notches formed on the exterior surface of the flange in circumferential alignment with the apertures. A support is positioned within the opening of the housing. The support has an interior extent in a cylindrical configuration and a forward extent with a hook. The cylindrical extent includes a pair of recesses. A pair of leaf springs each have a forward end, a rearward end and a central portion therebetween. The forward end is secured to the exterior surface of the housing.