Hard to actuate that knife open? The MONSTER Thumbdisk is the answer. 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! Fully polished then deep etched for an amazing look! Grip AND style! *Due to the nature of the material the pattern will vary slightly from piece to piece.* Fit all EKI and Kershaw/Emerson knives. ***These DO NOT fit the ZT-0620/30/40 series knives***