This company has introduced a range of ultra-low profile bolt-load washers that is ideal for bolt-load and tensioner tool calibration. Called TensionDisc (photo), the washers are specially designed load sensors that monitor bolt loads in bolted joint assemblies. A simple handheld reader with a wired or infrared connection allows for simple reading of the bolt load. These data can be exported via USB to a PC. Optional connectivity options allow for multiple uses of the data. Accurate and reliable for long-term use, as well as very easy to set up, TensionDisc is available for bolt sizes M20 to M72 (and inch equivalents). Special designs are also available on request. — TensionPro, Norton Canes, U.K.