Diamond Cut Elongated Curb Chains DCL-40 (1.6 mm – 1.2 Gr./Ft.) DCL-50 (2.1 mm – 2.2 Gr./Ft.) DCL-60 (2.4 mm – 3.2 Gr./Ft.) DCL-70 (2.8 mm – 3.8 Gr./Ft.)