Why do guitar strings break? How can you prevent your guitar strings from breaking?

In this video, we inspect the guitar tuning peg string holes for burrs, and use a small diamond tipped point to debur the holes.

If your guitar is breaking strings, its probably because of these burrs on your string holes.

Whenever you break a string, make a note of where the string actually broke. If it broke on the tuning peg end, its probably these burrs. If the string broke by the bridge, maybe theres a burr on the bridge / saddle