Joe Due Designed Custom tool so you can use Ratchet/ Breaker Bar/ Impact wrench to remove 7" Thread Arbor Cupwheels on Grinders with Dust Shrouds attached! Available in 3/8" or 1/2" Drive. Made from Toughest available AR500 3/8" Steel Plate. Designed to use normal readily available 5/16" or M8 bolts and hardware (you must supply yourself) as drive pins to grab the cupwheel. Slots allow for a 'one size fits most' styles. Have a favorite Cupwheel this wont fit? Maybe we can make one specifically for your application - Just ask Brad!