The "Navigator" design Monster thumbdisk with our "Grenade" style edge knurling! Made from 6al4v Aerospace grade Titanium and finished in a 2 tone anodized and satin Ti finish. The MONSTER Thumbdisk is 25% larger then the stock model, but without protruding past the scales. Drop in fit. This is THE answer to those hard to open knives! *DOES NOT FIT THE HINDERER FIRETAC OR ZT0620/30/40 SERIES OF KNIVES!*