A Utility Knife

For years, I used one of the old school utility knives which has a retractable blade. They work, but changing the blades was often a pain in the neck, especially when wearing gloves. Nowadays, we can do better.

A lot of tool companies now make folding utility knives that take the standard blade, and can usually have that blade changed in just a few seconds. If it comes with a pocket clip, even better to keep it on you when you’re working.