Abstract: A metal anchor for mounting screws in thin wall boards made of plasterboard, pressed wood or similar building material includes a body (1) formed from a sheet metal plate and provided with semi circular retention ridges (2) projecting alternately to each side, which are matched in width and pitch to the thread shape of the screw (13) to be tightened such that the retention ridges (2) engage into the latter's thread grooves (19). The entire body (1) is formed of three sections, of which the first section (4), situated on the outer end, bears the retention ridges (2), the second section (5), situated in the middle, has two axially running outer bending ridges (7) and two inner bending ridges (8) which are mutually separated by slits (12) and can be bent off in opposing directions, and the third section (6), situated at the head end, is provided with semi circular guide shells (9) extending in opposed directions for inserting the screw (13.).

Abstract: An alcoholic concentration indicator comprising three superposed circular discs adapted to rotate about a common axis. The lower disc displays on its margin a scale of alcohol concentration indicia and over its central surface a multiplicity of numbers representing the number of drinks consumed. The middle disc has a series of aperture across a diameter to provide usual access to the numbers appearing on the central portion of the first disc. Each aperture is identified by a weight of a human body. A scale of consecutive numbers also appears to represent the number of hours elapsed since the first drink. The top disc is transparent and displays two pointers: one pointer for the alcoholic indicia and the other pointer for the time elapsed since the first drink. The desired results are obtained by visualizing the number corresponding to the number of drinks through the aperture corresponding to the weight of the user.