Here's a brand new super assortment of curved watch spring bars made of stainless steel. These are used for special purposes for today's fancy watches with hard-to-get-on bands. This complete assortment contains 6 sizes, 1/2" to 13/16", a total of 72 pieces, 1.5mm thick (thinner than the standard 1.8mm)..Comes in a plastic 6 compartment plastic box, as shown below..