You are either the kind of person who gets deep satisfaction from getting the grunge out of your sink overflow or not. I am. This set of three sink brushes is a must for anyone with a slight OCD about cleaning. The round one cleans the plughole (Oh! it’s meant to be SHINY!) the long thin serious-looking black one is for getting hairs out of the plughole (leave this job a while for full satisfaction) and the right angled one is for slotting into the overflow at the back of the basin rotating ninety degrees and pulling out to inspect and then squeeling for joy at the amazing stuff that was lurking there. You can then run and show someone. They will be very pleased.