From time to time we invest a month in R&D when were slow , this is the smallest button fired auto I have ever designed an built call it my Tiny Trapper Dual-Action Auto made from 440-c with a RC hardness of 59 blade is .070 thou thick (1/16 in thick =.064) it has high tensil 1/16 stainless pins an Liners with Nickel silver bolsters an Button . it is 3/10th of an inch thick at the thickest point this is the prototype in the picture , hope you enjoy