The clamps function like you expect (use a 1/4" socket driver), however I noticed that my magnetic bit tip, was able to hold clamp in mid air - from anywhere on the clamp! I suspect these are a lower grade ferritic stainless that may actually corrode. Austenitic (304,316,etc) stainless doesn't (normally) have magnetic properties and is less likely to corrode in our brewing environment. I used em anyways. I noticed that on 1/2" tube they have about a 1/4" tab remaining once tightened down. The edges are not sharp like other clamps and the rounded corners on the tab, thankfully don't cut soggy hands.
Work as designed. Only shortcoming is that they can sometimes strip if you crank them with the wrong size bit, but that only happened to me once out of 20x.
Given all the liquids and moisture involved in homebrewing, these clamps are always corroding for me. They must not be made out of stainless or any kind of galvanized metal (can't tell from the description).
