Rigging a. Frequently used shackles on the domestic market, according to the standard of production is generally divided into three GB, ANSI, JIS class of American standard's most popular, due to its small capacity are widely used. Classified according to the type of G209 (BW), G210 (DW), G2130 (BX), G2150 (DX.) can be classified by type of bow-shaped (Omega) bow shackle, and d type (u-shaped or straight) d-type shackle; in place of use can be divided into both marine and land. Safety factor 4 times, 5 times and 6 times times, even 8 times (such as Sweden GUNNEBO Super shackle). The material, common carbon steel, alloy steel, stainless steel, high-strength steel. Surface treatment is generally divided into zinc (hot-dip galvanizing and electroplating), paint, Dacromet plating (Dacormet).