The shackle resembles a capital D, hence its name.
According to the place of use, it can be divided into Marine and land use.
Safety factor is 4 times, 5 times, 6 times, even 8 times (such as GUNNEBO super shackle in Sweden).
Its material, common carbon steel, alloy steel, stainless steel, high strength steel and so on.
The surface treatment is generally divided into galvanization (hot plating and electroplating), paint coating and Dacormet plating.
