The CT-QT SPLINE(47) 1-5/8X23.5 by Field Tool Supply is a high-performance spline bit designed for heavy-duty drilling tasks. With a diameter of 1-5/8 inches and a length of 23.5 inches, this bit is perfect for penetrating tough materials like concrete and stone. Made from durable steel, it provides excellent strength and longevity, ensuring reliable performance. The spline design allows for a secure connection with compatible tools, enhancing efficiency during operation. Ideal for construction and renovation projects, this bit is essential for professionals seeking power and precision.