The RailTec Process was developed for the rail industry by FTI as a preventative system to diminish rail breakages, track-related accidents and derailments. The life of a bolt hole is increased significantly by producing a zone of residual compressive stresses around the hole by a mandrel pulled through a split sleeve.
https://www.coptool.com/makita-2017-new-products-event/ – Makita 18V brushless grinder body powering a powerful metal cutting carbide blade for flush cutting metal rod up to 1″ which is rebar #8. When compared to the Makita 18V hydraulic XCS01 which is much heavier, more pricy and can not do flush cutting this should be a better option for many.