For safety training, function testing or safely decocking without damaging the firing pin, A-Zoom training rounds are much more than conventional snap caps. They are precision CNC machined from solid aluminum to precise cartridge dimensions, then hard anodized for ultra-smooth functioning and long life.
Specifications:

Type	Dummy Rounds
Caliber or Gauge	40 Smith & Wesson
Rounds Per Box	10
Material	Aluminum
Chamber