What nail length should I use?

The nail should be 3x the thickness of the trim piece. For 1/2-inch trim, use 1-1/2 inch nails. For 3/4-inch casing, use 2-inch nails. Nails that are too short pull out. Nails that are too long blow through the work piece or hit wiring behind the wall.

Why is my brad nailer not sinking nails fully?

Four common causes: low battery (charge it), depth adjustment too shallow (turn the dial deeper), nail too long for the material (shorten it), or firing into hard knots (reposition). Clean the driver blade channel periodically — buildup causes inconsistent depth.

Best Cordless Brad Nailers 2026