Riviat
Brownlow Medallist
My old man had one which I inherited. Useful. Have no idea where it is now mind you.
Mine was a bit blunt so you really had to hit it with force. I think it lasted about 10 onions before the whole thing sort of just stopped rebounding back and fell apart. Made a Rogan Josh using the slow cooker and one of those packets with the whole spices and garlic/ginger stuff in it.