NU-LOK™ is the new generation of enhanced performance anti-noise shims, which provide a secure attachment to the pad plate. NU-LOK™ is specifically designed to cover all the contact points of the plate to caliper fit. Thanks to its geometry, the NU-LOK™ shim completely isolates the piston, avoiding even minimum steel-to-steel contact and then optimizing the anti-noise performance. In addition, thanks to the NU-LOK™ locking finger attachment system, the shim on the pad is self-attached, providing a secure attachment to the pad plate. On the road and during braking, the piston force makes the pad shift, and this tends to damage the traditional shim and compromises the integrity of the system.