Sintered diamond wheels will outlast single layer wheels (such as brazed and electroplated wheels) many times over.
Full 3mm deep diamond matrix exposes new cutting points as the wheels are used.
Sintered wheels can be dressed to expose additional crystals for a more agressive cut, but dressing is not always needed if you follow a "side to side" pattern when grinding to ensure even wear.
Aluminum cores reduce the wheels weight to 5.7 lbs.
Dynamic balancing at the factory ensures concentricity for smooth and quiet grinding.
Generally order one grit size larger for sintered diamond tools as compared to plated or brazed parts.