Michelin Stealth wiper blades don't fit

I bought the Michelin Stealth wiper blades at Costco but found out they don't fit. It would go into the "J" hook on the wiper arm but just slide off from it. I look at the factory original and found the original blade has a "locking mechanism" (see picture) to hold it in place. I searched the forum but no one else has ever mentioned this problem. Some even said they switched from original to the Michelin Stealth. How did they get it to lock on the "J" hook? Am I missing something?

 

Interesting! Even with the Toyota original, if I don't press down on the locking mechanism (as shown in my picture), the blade would easily slide off from the J hook. My Michelin Stealth wiper was purchased over a year ago at Costco. May be the one you used is an improved version now.
Thanks anyway.

 

I bought two M. Stealth blades and tried both again but it still doesn't stay on the J hook. Definitely the plastic attachment problem. I can use the pliers to close the gap on the J hook to make it fit if I really want to use the Michelin Stealth blades. Doing so will make it difficult to put the original blades back on.

 

*** Confirm the Michelin Stealth blades fit. ***
Finally got it on. It had to be pushed really hard until it goes in all the way to the end of the J hook. (During the process, I also broke the center decorative plastic cap with Michelin logo on it. )
Thanks for everyone's help.