Sewing on jean buttons can be a challenge and time consuming not to mention down right painful. Not anymore with these handy little things. Just press and a little twist and the turn of the included tool and your frustrations are over. No sewing no pins to stab you when the collar clamp falls off because these are secured with a threaded type screw. The washer back keeps it from tearing out making it extremely strong and durable. I really think these are a great value also so don't wait to buy and try because the only disappointment will be if you don't get them. Don't wait till you are putting on your favorite wear and one pops off because then it's too late so get them before you need them and be prepared before hand.