SinterFire Special Duty (SD) is a centerfire handgun ammunition featuring lead free frangible hollow point projectiles. Designed to increase safety and minimize lead concerns, this 45 ACP, 155 gr load is ideal for home defense. The ammunition utilizes high-quality brass casings and includes 20 rounds per box. Recommended use: home defense and self-defense. Safety Note Frangible ammunition is designed to break apart upon impact with hard surfaces to reduce the risk of ricochet and over-penetration. Always follow all safe firearm handling practices and verify range compatibility before use.