Shimano Exsence Silent Assassin 99s Flash Boost not to be confused with the Shallow Assassin is the most technologically advanced bass lure Shimano has ever produced. Available in suspending and Sinking versions, it is equipped with Flash Boost, Jet Boost and Scale Boost. The Excence Silent Assassin 99s Falsh Boost will certainly be the most appreciated lure by the most hardened gleaners. Length 99 mm. features Jet Boost for greater casting performance, perfect when fish are hunting from a distance. Flash Boost increases attraction by reflecting light, even when stationary and the Scale Boost stimulates predators to attack a bait very similar to forage fish. Using steady and smooth retrieval, the Silent Assassin 90F Flash Boost has a tight rolling action, but can be jerked, twitched for even more captivating.