New! Now you can stop dealing the the frustration of taking your trimmer exhaust manifold off and on using the hard to get to screws. Simply install the base plate around the die (just a one time thing), and then you can twist the vaccum manifold to unlock or lock it place ! Two strong magnets also hold the back half onto the other front half Fits dillon 650 / 750 standard tool head 300 Blackout short tool head version in my store.