Product review (5 stars): They work.  They will keep your dishwasher rack tines from rusting or cover the tip of a rusting tine.
These do work.  They were fairly difficult to place on my dishwasher rack tines (very tight).  Because they are so tight you will not need any glue because once you get them on they will never come off.  The easiest way to put them on is to put the tip on only part way and then put the others on part way.  Then come back to the first tip that you placed and it should have stretched enough to get it all the way down on the dishwasher rack tine.  Your finger may hurt a little from pressing them down when you are done.  Good luck!