This Artist-designed Series is Available in Varying Hardness So Can Find the Perfect Fit for the Sound Want. Soft: With a Dark Fundamental, This Mallet Projects a Beautiful Sound in the Low Register of the Marimba. An Ideal Mallet to Roll. Medium Soft: Ideal When Articulation is Required in the Low Register While Maintaining a Fundamental Dark Sound. Medium: a Full Sounding Mallet With Articulation for the Lower Half of the Marimba. Medium Hard: the "General" Mallet of the Series. Covers the Entire Range of the Marimba With an Articulated Dark Fundamental Sound With a Touch of High Overtones. Hard: a Bold and Articulate Mallet Well Balanced Mallet Between Fundamental and High Overtones. Hard & Bright: a Crystal Clear Sound Can Be Created and Yet With a Tone That is Full and Rich. Very Hard: Designed for the Top 3 Octaves for the Most Projected Clarity.