The Performance Collection mallets were designed to be the centerpiece of the Salyers Percussion brand.   This collection has 6 PCM models for marimba, 4 PCV models for vibraphone, 17 unwound PCX models, several PCS concert drumsticks as well as PCBD concrt bass drum mallets and PCG gong mallets.  If you are ever in doubt, go with the Performance Collection and you will always be satisfied.