The KNK Zing Thick Material Blade is recommended for cutting textured cardstock, chipboard, rhinestone template material, Shrinky Dink, stiffened felt, craft foam, craft plastic, balsa, Grungeboard, gum paste/fondant/Sugar Veil, clear stamping rubber, poster board, and other thick materials. This blade comes with a spring and fits into the red, blue, and yellow KNK Zing blade holders.