If the adhesion of the wall surface is not reliable in exterior sheathing applications (hollow unplastered brick), the most appropriate dowel is the mechanical sheathing dowel with rivets. In case of hole diameter growth (breaking, scattering or cracking of the adhesion surfaces) caused by the structure of the wall surface during the puncture, in addition to its own opening, the socket that closes when entering the socket. It has mechanical nails that open automatically when there is an empty space when it enters. In this way, no matter how wide the hole diameter is, it will hold on. On poor quality wall surfaces, especially if there is no rough plaster or plaster work on the wall surface, the dowel to be used is the sheathing dowel with mechanical nails.