Product Name: Metrotrak HA jaw plate,jaw liner. Features and Advantages of Metrotrak HA jaw plate,jaw liner . 1. Materials: high manganese and customised material. 2. Use: wear parts for crushers in the quarry, mining, cement aggregate, recycling, shredding . and demolition fields. etc. 3. Certifications: ISO9001 TS and CE certification. 4.