Product review (4 stars): These were a little difficult for me to get in ...
These were a little difficult for me to get in, but that was due to the size of my stove and the space between the counter and stove. Your results may vary. Once I got them in the held on well and help keep crumbs from falling down between the stove. You do still get small crumbs between the edge of the stove top and the extender,where is pressed against stove or counter, but that depends on how your stove top is constructed.