The wear indicator is one mechanical accessory or part fixed on the disc brake pad. when the brake pad Wear to the limitation, the wear indicator will rub the brake disc and produce a scream to remind the driver to exchange the brake pad in time. Name: Wear Indicator(Mechanical) Material: Spring Steel Process: Stamping&forming Application:Accessories of disc Brake Pad for wear indication Market:OE/Aftermarket Sample:Free of charge MOQ: 1000pcs