Abstract: A fastener such as a set screw which is used for clamping materials. The set screw has an aperture provided at one end thereof for acceptance of a tightening means. An opposite end of the set screw has an aperture which is capable of accepting a shaft portion of a pin member. A head portion of the pin member is positioned outside of the aperture at an end of the set screw and has a point surface which clamps against the materials to be clamped. Upon rotation of the set screw by the tightening means, the pin member also rotates. The pin member continues to rotate with the set screw until the point contacts the material to be clamped. Continued rotation of the set screw forces the pin member to clamp the material, without rotating, such that the material engaged by the pin member will not be damaged during the rotation of the set screw to its final position.

Abstract: A safety cover for a dual electrical wall mounted outlet has a base plate with apertures that register with dual electrical wall mounted outlets. A pair of covers are pivotally located to cover the outlets. Resilient members such as elastic bands are provided to yieldingly hold the covers over the outlets. Slideable operating rods or elements are mounted for movement towards each other with one of the elements each being connected to one each of the covers so that when the separate operating elements are simultaneously moved towards each other, the covers will pivot away from the apertures to expose the outlets. The outer ends of the slideably mounted members are spaced apart sufficiently to prevent a small child from using the thumb and fingers of one hand to move the slideable members towards each other to disarm the safety cover.