Quick info on what the difference is.
Most common size of gauge is 16 or 18, higher the number thinner the nail.
Meaning the number stands for how many nails per inch. So if you see 18 gauge it would have 18 pieces per inch which are going to be thinner than 16 gauge because 16 gauge has 16 per inch.
What is a Brad nailer used for?
Brad nails are formed from a fine, 18-gauge wire, so they are smaller in diameter than finish nails and typically have less holding strength. They're better suited for tasks like light decorative trim and molding, panel installation and crafts. Their size also helps prevent surface splitting, which can occur if the fastener is too large for the material it's being driven into.
One of the benefits to an 18-gauge brad is its size. Thanks to a smaller head and diameter, brad nails are easier to conceal in small pieces of wood trim. With a smaller head size, it's possible that the insertion point may not even need to be concealed with wood putty. In other words, 18-gauge brad nails provide a cleaner look than a finish nail without extra touch-up involved.
Typical jobs might include:
They have many uses but they are most commonly used for:
-Trim work
-Paneling
-Fastening decorative molding
-Casing n Baseboard
What is a finish nailer used for?
Finish nails are made from heavier 15- or 16-gauge wire, which means they can handle a greater payload. For larger trim, such as baseboards or crown molding, a finish nail is more suitable. A finish nail offers increased support and withdrawal resistance versus the brad nail, making it the better choice when installing larger trim and woodwork.
Because it leaves a more visible hole in the surface, a fully driven finish nail almost always requires followup attention—which includes being puttied over to conceal the "shiner" (the exposed insertion point of a nail).
Finish nailers are used for heavier projects which will need a bit more strength and holding power.
Typical jobs might include:
-Installing crown and base moldings
-Window and door casings
-Chair rails Cabinets
-Exterior trim Staircases
-Hard and softwood flooring
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