That's not a CBT crusher. The device that the nurse is holding is a screw twitch. It's used to clamp horse's lips when you have to trim their faces, if I remember correctly. Regardless, if you want to buy one, don't pay $28 for one from some place which sells it as a CBT crusher, buy it for $8 from someplace which sells horse equiptment. Once you buy it, you can use it however you want.

Smack