These high speed steel Titanium Nitride coated tools are ideal for smooth and accurate reaming of holes in tube sheets of Condensers, Coolers and Heat Exchangers. Features of Tube Sheet Hole Reamer High speed steel, cryogenically treated and coated with Titanium Nitride for long life. Ideal for heat exchanger and condenser tube sheet reaming. Reamers available in MM sizes also. Also available on diameters upto 4”.