A device intended to be used with a hand-held ultrasound (US) imaging system transducer to provide a means to attach/hold an electromagnetic (EM) sensor or needle guide to the distal end of the US transducer in a repeatable position (can detach/reattach to same place on transducer). It is a metal/plastic bracket available in various dimensions that is manually applied to the US transducer. It is typically used in conjunction with an electromagnetic device tracking system and is intended for applications involving needle guidance and tracking such as ablation, core tissue biopsy, fluid aspiration, therapeutic delivery and vascular access. This is a reusable device.