A plaster lath stud finder is a specialized tool designed to locate studs behind plaster laths, a common wall construction method in older buildings. Unlike traditional stud finders that detect electrical currents, plaster lath stud finders use magnetic or electronic sensors to detect the metal laths or plaster buildup around the studs. These finders are essential for renovation and repair projects, as they allow non-destructive identification of studs for secure fastening of fixtures, outlets, and support structures.