Metal Bonded Diamond Grinding WheelWhen you've got to make more cabs than you can count, it's time to go sintered. The longest lasting wheels on the market today, with a full 5 mm of diamond matrix, and solid aluminum cores; you won't believe how long these wheels last. Sintered wheels will also cut just as aggressively on the first cab as the last. If you haven't used sintered wheels before, we recommend you order one Grit size larger for sintered diamond tools as compared to plated or brazed parts. Reducer rings available to fit most machines. all wheel arbor is 1" comes with reducing bushing in 3/4", 5/8", and 1/2". Available in a variety of Grits and sizes.