... 1.low carbon steel 2.high security & safe 3.any color is availlable 4.superior quality,good price container bolt seal, steel lock1.low carbon steel2 ... Paramenters :• both pin and cylinder is made of high quality low-carbon steel, ABS plastic wrapped.• tensile strength :>15KN, once locked, its ... containers, van trucks, tank trucks etc.There are special requirements for this product, may contact us!