I bought these to secure the LMR-400 coax cables around my house (inside and out). This is the correct size for the LMR-400 cable. You must insert some small screws. I used a #6 x 3/4" screw. It's not very thick plastic, but it works well for my needs. I didn't break any during installation and had a hard time with some of them. Of course there are better clips but these work well and the price is right.
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