Power Slot is Centric's performance division focusing on entry level brake upgrade solutions. Power Slot pioneered direct fit performance rotors for trucks, SUVs and severe duty vehicles, delivering superior and reliable braking even under hard driving conditions.Excessive heat can cause resins in your brake pad to vaporize or "outgas." As the brake pad wears, the used friction material turns into a fine dust. This boundary layer of heat, gas and dust builds up between the pad and rotor surfaces and inhibits performance. Here's where Power Slot's slotted brake rotors make a big difference. Power Slot's Vac-U-SlotsTM are machined into the rotor and help evacuate gasses and dust, shed heat, and keep the brake pad surface clean. And in wet, raining conditions, Power Slot's Vac-U-SlotTM helps push water off the braking surface for better stopping power. The Vac-U-SlotTM also serves as a visual wear indicator. The slot is machined to the rotors minimum thickness where it crosses the outside edge. If you cannot see the slot along the outside edge, the rotor has worn down to the discard depth.