Making small, precise timing changes with a crank trigger is simple with the EZ-Adjust! This accessory installs to most MSD Flying Magnet Crank Trigger brackets. Adjustments are made by turning a bolt rather than loosening the entire pickup assembly and moving it. Once you adjustments are made the Adjuster locks in place.Note: Will not work with the SB-Chevy, 6.25 kit P/N 121-8600