The high-resistance to fatigue and wear, even under the worst operating conditions, distinguishes track links .They are made of deep hardened boron steel, which has appropriate hardness and adequate thickness of case hardened area ,undercarriage spare parts for many famous brand : Caterpillar ,Komatsu ,ATLAS-COPCO, BENATI, BENFRA, CARRARO, CASAGRANDE, NEW HOLLAND, CLAAS, DAEWOO, DEMAG, DEUTZ, FAI, HANOMAG, P&H, HYDROMAC, ILME, INGERSOLL, INTERNATIONAL, ITMA, J.C.B., JOHN DEERE, KOBELCO and so on