It's big, it's black, it's badass! Machined from a solid bar of Zirconium, the MONSTER thumbdisk is 25% larger than the stock model without protruding past the scales. Drop in fit. This is THE answer to those hard to open knives!! Available in "Rifle" knurling, in either machined or bead blast finishes. *Does NOT fit the Hinderer FireTac or ZT-0620/30/40 series knives!*