AST-1: Tightener Brackets ・ For mounting AST and SAT tighteners ・ Easy to change mounting directions of tighteners Material: AST65-1: SPCC Steel, Cation coated, Black color AST100-1: SPHC Steel, Cation coated, Black color Datasheet: https://www.imao.co.jp/files/on-cat/pdf/en/ast-1.pdf