4" QQA Silent Diamond Cup Wheels with Rubber Backer

The new QQA rubber backer integrated diamond cup wheels are designed with user friendliness in mind. The Rubber backer significantly reduces noise and vibration during grinding, thus reduces job site fatigue significantly.  QQA stands for Quiet & Quite Aggressive. 

• Rubber backed to reduce noise up to 90%
• 5/8-11 thread fits most grinders
• Wet use recommended
• Recommended for grinding stones and concrete
• Recommended speed: 6000 rpm with 10,000 RPM maximum
• Coarse, Medium and Fine grit available