XENA's has introduced an ultra compact version of its top-flight XN range of disc lock alarms that is easy to transport but offers such a high level of security that insurers in many countries approve it. The XN10 is manufactured from top-grade, high nickel-content stainless steel with a highly polished finish. It locks onto the motorcycle brake disc with a 10mm thick steel pin with a double-locking system, so it cannot be prised open. As a result, it is tested and approved by both Sold Secure and Thatcham in the UK, ART in Holland, SRA in France and VAT in Scandinavia. In spite of this the XN10 weighs in at just 635g, making it easy to carry and convenient to use.