Nothing special. Easily fall off.

I use sticker mule for a number of projects and I love every other product I've bought, however; I decided to buy buttons for my coffee brand and the first round sold like hot cakes which was great but a number of customers complained about they were not very secure. The pin does not latch very tight and easily comes undone. I don't know if this is a problem with all sizes but definitely a problem with the 1" buttons. Many of my customers lost their buttons from this within the day they got them. Just a bit bummed because I have so much respect for this company!