I'm using sm57 a lot in my home studio for demo work as a handheld voice/vocal mic for quick ideas and needed a popshield. Original Shure A2WS Black is twice the price and you have to screw it to the mic, it has plastic ring so you can't fit it in the mic pouch, while AKG W1001 fits sm57 like a glove, you can pop it on/take off in a second and put it in the mic pouch without damage. Perfect!