Abstract: This paper introduces and compares themost widely used techniques in the non-destructiveevaluation of residual stress. The emphasis is onmagnetic methods. This paper also introduces a newresidual stress measuring kit, MAPS, which is comparedwith other conventional devices. Since researchersin the mainland are also making a similar device,this paper will be of value to them. This paperalso compares the results obtained from MAPS, neutron diffraction, and X-ray.