This FLYNN 4 Boring Head is a high-quality tool bar holder designed for use with lathe, mill, and drill press machines. Made in the United States, it features a 1 1/4 straight shank taper size and a straight shank type for easy installation. Its durable construction ensures that it can withstand the rigors of industrial use, and it is suitable for a variety of applications. This tool is a must-have for anyone looking for a reliable and efficient tool bar holder that will stand the test of time.