The CT-QT SPLINE(46) 1-1/2X48 from Field Tool Supply is a robust spline bit designed for heavy-duty drilling applications. With a diameter of 1-1/2 inches and a length of 48 inches, this bit is perfect for penetrating tough materials like concrete and masonry. Made from high-quality steel, it offers exceptional strength and durability, ensuring long-lasting performance. The spline design provides a secure connection with compatible tools, enhancing efficiency during use. Ideal for construction and renovation projects, this bit is a must-have for professionals seeking reliability and power.