 Beryllium is non @-@ magnetic . Therefore , tools fabricated out of beryllium @-@ based materials are used by naval or military explosive ordnance disposal teams for work on or near naval mines , since these mines commonly have magnetic fuzes . They are also found in maintenance and construction materials near magnetic resonance imaging ( MRI ) machines because of the high magnetic fields generated by them . In the fields of radio communications and powerful ( usually military ) radars , hand tools made of beryllium are used to tune the highly magnetic klystrons , magnetrons , traveling wave tubes , etc . , that are used for generating high levels of microwave power in the transmitters . 
