Product Description A Keson best seller! Since 1968 this style of Keson steel tape has been providing customers with accurate measurements. They are used in the harshest conditions in which people measure, and they stand up to the only test that matters: field performance. From the Manufacturer Nylon-coated steel tape measure is uniquely break resistant because of a .2mm thickness of permanently bonded nylon which is coated (not sprayed ) over a sturdy .13mm steel core center. Corrosion resistant, even to salt water, with life of more than three times that of ordinary steel tape measures.