These pads give better stopping power with longer life and NO noise. The Nucap NRS hook system on the backing plate gives five times the bond strength of conventional pads. Deep grooves in the pad aid venting and remove any debris which helps with the cooling of hot pad areas. USR Slotted Upgrade Brake Rotor. Sold in pairs for front or rear fitment. Wider aperture grooves dispel gasses and debris. Manufactured from unique rotor alloys. Slot pattern gives quiet braking. Thermic black coated for maximum corrosion resistance. Inspected for runout. These rotors are made from special rotor alloys which are unique to EBC Brakes. Rotors are precision machined by EBC Brakes with a slot pattern that gives quiet braking, improved brake performance and increased lifetime of the rotor. All EBC Brakes USR rotors feature corrosion resistant thermic black coating.n machined by EBC Brakes with a bi-directional slot pattern that gives silent braking and better pad venting. All EBC Brakes BSD rotors feature corrosion resistant thermic black coating.