Put Noise on the Line with an underwater acoustic engine. The fish are getting smarter! On heavily pressured waters, standard, smooth-bodied factory spinners just swim by unnoticed. The Glass Armadillo is engineered to shatter that silence. Named for its uniquely armored, segmented body, this custom spinner combines traditional craftsmanship with advanced underwater acoustics. We swapped out cheap, dull plastic beads for four faceted, fire-polished glass beads and three free-wobbling thin metal friction discs.