Soft
steel for making blue steel, winding stems, pivots, balance staffs and pallet
arbors etc.
I
am also use it making springs for antique pocket watch. Total 18 pieces, Length
about 5 inch (130mm)
Size includes: 1.5mm 3Pcs, 2mm 3Pcs, 2.5mm 3Pcs, 3mm 3Pcs, 4mm 3Pcs, 5mm 3Pcs.