The Cordhead 210 series of mallets express a clearer tone to that of the Woolhead mallets. Cordhead mallets are most often used for Vibraphone and Metallophone performances. No.211 best matches Xylophones. No.213 best matches Vibraphones. Model Hardness No.211 Light Hard No.212 Medium Hard No.213 Medium Hard No.214 Medium No.215 Medium soft No.216 Heavy soft