When you’re installing 1/8-inch cable railing, picking the right drill bit size is critical. Using a bit that’s too large can loosen the cable fit, while one that’s too small might cause damage or make threading difficult.

You want a drill bit size that matches the cable diameter closely, but there’s more to take into account, like the material you’re drilling into and how precise your holes need to be. Let’s explore how to get this just right.