From the perspective of a woodworking expert, our Screw-On Mortise Bit Arbors are a versatile addition to any woodworking tool collection. With a 1/2 inch shank and 2 5/8 inch overall length, these arbors can be easily attached to your mortise bit for precise and efficient drilling. The 1/4-28 threads provide a secure fit, ensuring steady and accurate routing every time. Perfect for woodworking professionals and hobbyists alike.