Fastener Guide
Thickness or Gauge
Gauge is the measure of your metal fastener’s thickness. Different gauges are recommended for different uses. Higher gauge equals thinner material.
23-gauge – For small painted or stained moldings (typically used to hold materials together while adhesive sets or cures)
21-gauge – For small painted or stained moldings and medium to small casings or chair rail (provides similar appearance to 23 gauge with 80% holding power of an 18 gauge)
18-gauge – For medium to small casings, chair rail or low-profile crown molding
16-gauge – For the outer nail on casing (through drywall) and for base trim or other large trim
15-gauge – For the outer nail on casing (through drywall) and for base trim or other large trim , and sturdy install of door jambs, particularly heavy, solid-core doors.