The MSC Threaded Boring Head Shank Type R8 7/8 Inch - 20 Thread Taper is a high-quality toolholder designed for CNC, metalworking, and manufacturing applications. With a taper size of R8 and a shank type of R8 Shank, this product ensures precise and reliable toolholding for your workholding needs. Additionally, it is important to note the California Prop 65 Warning associated with this product, indicating that it contains chemicals known to cause cancer and birth defects or other reproductive harm. This product is a reliable and essential addition to any industrial tooling collection.