This Hitachi 956004 hollow core bit is a great addition to your rotary hammer collection. Designed for use with 3-11/16" hollow core drills, this bit is perfect for a variety of applications. With its durable construction and reliable performance, you can trust this bit to last for years to come. Whether you're a professional contractor or a DIY enthusiast, this Hitachi bit is sure to meet all your drilling needs. So why wait? Add this high-quality bit to your toolkit today and start enjoying its superior performance and longevity.