Based on research conducted by real officials in live games, The Magnetic Fingergrip brings the comfort of the traditional fingergrip with extra versatility. The whistle detaches from the fingergrip for optimal range of motion using Fox 40’s new Magnetic Fingergrip Technology (MFT). Developed by officials & engineers in Hamilton, Ontario, Canada with input from sports officials globally. The Fox 40 Magnetic Fingergrip is the new standard for officials wanting to stay at the top of their game.