TheThe FX59 FlashFX trimmer is a slim, modern trimmer that is lightweight, low heat and low noise. It’s the perfect tool for hairline trimming, creating designs and other detail work, and the snap-on guards make it ideal for cleaning up beards, sideburns and the neckline, too. Four guards included. FX59 FlashFX trimmer is a slim, modern trimmer that is lightweight, low heat and low noise. It’s the perfect tool for hairline trimming, creating designs and other detail work, and the snap-on guards make it ideal for cleaning up beards, sideburns and the neckline, too. Four guards included.