tender for 1. alloy steel d-shackle gr.63, 10 ton (04 nos) 2..alloy steel d-shackle gr.63, 20 ton (04 nos) 3.alloy steel d-shackle gr.63, 40 ton (04 nos) 4. alloy steel d-shackle gr.63, 60 ton (04 nos) make :- mahimatechno udyog with testing certificate .