The decapping stems are mass produced, probably in the tens of thousands of pieces per run. So, if someone breaks one the "failure ratio" is very, very small. I have been using Lee dies for well over 35 years and tens of thousands of rounds combined (Lee dies in 10 different calibers) and broke one. Actually I have had to replace twice as many RCBS pins than I have Lee stems (two!). But as mentioned above Berdan primed cases and cases with off center flash holes are pretty hard on decapping pins/stems. Case inspection is the best way to keep your tools in good working order...