Brad nailers and finish nailers get confused due to their similar looks, but they have key differences in price, purpose, and size. A nail gun can greatly increase your efficiency on the job, but ...

The brad nailer runs 5/8" to 1 1/4" brads. I use both sizes, it really depends on what I'm doing, but mostly I use the 1 1/4". I haven't used the finish nailer yet.