Brakes are designed as a system and all the parts need to work together for best performance. The boot and square cut seals included in our Caliper Repair Kit, ensure that the caliper works as designed during the apply and release cycle. Product Features:This part matches Original Equipment (OE) quality specificationsEasy and fast replacementEnsures the brake pads are meeting the rotors at the correct angle for an even braking systemCorrosion resistant coating for long-lasting durability against harsh roadsManufactured with quality materials to suppress high stress levelsHelps deliver a quieter, more efficient braking system