Bought these to use with some Propet walking shoes that I bought.  Had a hard time getting them through the small holes, had to use a needle nose plier to grab the end and pull and release (was afraid it would tear) until I got the whole thing though.  Then decided to get a screw driver to temporarily open the lace holes wider (also helped to push through the lace on difficult ones) and managed to get all 10 in, good thing it's not 8 pairs per shoe that I needed!  It took a very long time to do and I don't foresee myself willingly going through this again!