Semi-Sintered Brake Pads HARDDRIVE HardDrive Performance Brake Pads are engineered specifically for the needs of Harley Davidson V-Twin Motorcycles. Semi-Sintered Material: Enhanced performance with feel of an organic pad but the wear characteristics of a sintered pad Provides stable braking power and lower brake dusting Heavy Duty Organic and Copper Sintered material blend Recommended option for larger models and touring type riding _________________________________________________________________________________________________________________________________________________________________