Here is how Professor Sadlo himself evaluates them: "I
discovered several fundamental advantages in the Pendim mallets combined
in a way I have never before encountered. They have a full-toned sound
extraction without being heavy, offer a wide variety of models, allowing
easy playing of the tremolo, identical sound extraction in all ranges
of the marimba, as well as mallets for special effects. The handles
are made of specially selected birch-wood which combines the advantages
of the rattan (elasticity and gentle attack on the bar) and wood (perfect
control over the mallet)."