DRILL RODS:The most sustainable Drill Rods which gives very long life and KLR Drill Rods comes with ISO 9001: 2015 certification.KLR Drill Rods:3", 3½" , 4½" , 5½", 5", 10", 15", 20", 30". Advantages:Increase in the Life of the Drill Rods by up to 100% more than any Normal Drill Rods.Reduces one side Rubbing, Hole Deviation and Leakage at Joints. No Welded Layers will be visible and hence there will be less tolerance in the Rod Guide.