Double ended stud bolts with reduced shank DIN 2510 Material: 21crMov 5.7 With 2 heavy hexagon nuts Material: 24crMo4 M 1 1/2" X 20 mm: 10 pcs. M 1 1/4" X 160 mm: 10 pcs. M 7/8" X 140 mm: 20 pcs. Please indicate approximate weight and dimensions and country of origin