Review on 71cm Long Flexible Sink Overflow Drain Cleaning Brush for Efficient De-Clogging by Josh Gerhardt

This drain is too big to overflow (I tried 3 different sinks). First, the bristles are 1 inch long. Second, there is a 1/2" plastic protrusion at the end that is about 1/4" in diameter. Third, metal wire is very stiff. This means IF you can put that plastic end into the overflow drain, the rest won't bend so you can push it down. Using pliers, I made a sharp bend on the end of the plastic end just to push it down the drain, but then it got stuck - barely pulling it out. Note: I gave it two stars instead of one because it seems to be working. at the drain to remove the dirt that collects where the drain plug is located. I'm too scared to try to get through the P-trap.