

So any stainless steel will do that. No need for a special disk. I use a stainless steel cocktail shaker to peal garlic. Then when I rinse it clean it also removes the smell from my hands.
Just drop the cloves into the shaker and shake hard for 30-45 seconds. Most of the garlic is now peeled and some just need a bit help. So much faster and easier.
Twice a time period. Semi for every two time periods. So every two weeks is semiweekely. However it gets misused so often you almost always have to check making it almost useless.
Similar to failsafe vs redundant.