The magnetic properties, abrasivity, corrosion resistance and electromagnetic characteristics of metal tapes containing acicular CrO2 particles were studied. The following results were obtained; The Bs of tapes decreased with CrO2 addition. The playback output level and noise level decreased, but the C/N level increased, at 4 MHz. The abrasivity of the metal tape was improved by up to 96 % that of commercial oxide tape by adding 50 wt% CrO2. The corrosion resistance of the tape dropped significantly.