1)door & window bolt 2)material stainless steel, iron 3)used for door & window 4)good antirust ... Hinge products door &window bolt introduction as following:1, Material:Stainless steel hinge, copper hinge, aluminum hinge, iron hinge2, Surface ... bolt, small hinge, AA column, aluminum ladder column, stainless steel ladder column, stainless steel bracket. Carrying large stocks with great quality & lowest ...