A CLEAN AND READY TO USE MORTISE MACHINE MORTISE BIT by Goodnow & Wightman, Boston, Massachusetts. This 5/8" inch size bit tapers from 7/16 inch to 1/2 inch at the shoulder above the squared section of the bit. This bit is in excellent condition and could be put directly to use if you have a properly configured mortise machine. Length = 7.00 Inches (Ref. Id No.: 414026) [Free Shipping]