Festool 578721 Template KR-D 3/8 /OF 1010 is designed for precision and ease when working with routing templates. The copying ring, measuring 3/8" in diameter, is i for use with router bits up to 7/32" in diameter, allowing for accurate and efficient template routing. Its design includes a centering mandrel, which makes it simple to center the ring ly for your project needs. This tool is indispensable for anyone working with templates, providing reliable performance and enhancing the quality of your routing work. Model Number: 578721