Review (5/5): These pins won't open and stab you.
I think this is the 4th time I ordered more. The smaller pins that look like this one open and stab my wife in bed. Sure it's hard to open them, but I am 84 and weigh 125 and can open them. The smaller pins are worthless to me and if I knew you I'd give them to you.
Use a pliers to open them if you are not strong enough.