The Hawk Performance DTC-70 (HB521U.650) is a high-performance race brake pad designed specifically for professional road racing and circuit use. The DTC-70 compound offers extremely high torque with aggressive initial bite and superior release and control characteristics. It is engineered for vehicles with high deceleration rates that operate in high temperature ranges. Technical specification: Thickness: 0.650 inches (16.5mm). Pad shape: Wilwood 7420 Type. This set includes a complete axle set of 4 brake pads. Key features: Operating Temp Range: 400-1600°F (200-870°C), Optimal Temp Range: 800-1200°F (425-650°C), extremely high fade resistance, and excellent consistency. Warning: For track use only, not intended for street use due to high noise and dust levels.