now I know why you got a giant bag of them. within the first three minutes of me going through regular crabgrass. I was not next to any solid objects there were no sticks or trees. it got partway into the crabgrass and disintegrated. so I took the time to put another one on went back out there and trying to get through the rest of that crabgrass which is only about 8 in tall the next one disintegrated as well. these things are absolute crap you're better off buying the metal blades. I should not have purchased a weed eater that requires these attachments. do not buy these they are so soft when you bend them it's almost like they're made of silicone and rubber. they do not cut anything but standard simple plain grass. I can't imagine what these things are like if you hit weeds. they are for a weed eater and these things will not go through crabgrass. it is a waste of money. they rip you off they know they don't work. I don't know who's giving these things five stars I went through 12 of them before I gave up and threw the whole thing in the trash. i absolute crap. don't waste your money. and the time it takes to shut off your weed either, turn it over and use the wrench to take off the nut, put a new attachment on bolt it down go back out into your yard and within three or four minutes disintegrate another one. rinse lather repeat. I don't know who's giving these five stars. if I threw the whole thing in the garbage and switch to standard metal blades that's a sign that the reason they gave you an entire fat full bag of these things is because you're going to burn through them I don't have time for that. I don't think anybody has time for that. and after the third one coming apart you're going to lose your mind because that is what I did. waste of money, waste of time and if you're giving it five stars you must be cutting regular grass with it. by the metal blades or the saw blade stay away from these plastic things.