1) round anchor. Specification model is expressed as: (2) flat anchor. Specification model is expressed as: BM15-N or BM13-N (B, flat anchor the first letter of Chinese phonetic alphabet, representing the meaning of flat anchor); flat horizontal deck type anchors used prestressed, hollow, low-height box beam, so that the stress distribution is more even and, further thinning the thickness of the structure. (3) bond-type anchor. (Fixed end anchor) specification model is expressed as: TYM15-N or TYM13-N; applied to fabric design stress and high end components or end the situation of limited space, it uses the extruder casing pressure will squeeze the steel twist knot An online bond Anchorage, it embedded in concrete, arranged according to need, to the design strength of concrete after solidification, during tensioning.