JT drive chains 520X1R2    Products of the highest quality, ie top technology using special steel alloys of the highest quality. Lower weight with maximum tensile strength. - 2-fold reinforced X ring chain open with dual lock - The included dual lock includes all necessary spare parts for a rivet and clip lock solution - X-ring sealed chains provide significantly better protection against premature wear - 4-way pressed chain pins for extra strong hold against lateral forces on the outer flap - Stable, riveted bearing collar for permanent strength, as well as for an extra strong hold against lateral forces on the inner flap