If your fishing leader keeps breaking, the location and appearance of the break can help you distinguish a slipping knot from abrasion or sudden strain. Check those clues before tying on another lure or reaching for heavier line.
Essential Concepts
Find the break. Inspect the line. Retie and test.
Related posts: [Braid-to-leader knots](/braid-to-leader-knots/) and [Checking fishing line for abrasion](/checking-fishing-line-for-abrasion/).