Vibration exciter fasteners Type 4 "Drywall" fastener - designed for fastening vibration exciters to drywall and thin-walled plastic (plywood) structural elements, in cases where the characteristics and properties of the materials make it permissible to install the vibration generator-emitter on 3 "short" self-tapping screws. In addition, the fasteners can be used to mount vibration exciters directly on glass using glue in cases where the use of Type 3 fasteners is unacceptable, and hardening (polymerization) of the glue is possible without illuminating the glue joint.