B67-364 COMBINATION BREAST DRILL. Malleable Iron Fitting Co. Patented in 1912, features a double drive wheel so that you can slide the gear on the shaft up or down to engage the breast drill or reciprocating valve grinder action. Has "MIFCO Combination Breast Drill & Valve Grinder" cast into one side and the patent date into the other. 16-1/2" long. The chuck is Fegley's "protected spring" design marked with the 3/15/10 patent date which was primarily used by North Bros. Typical light wear but no damage. From the collection of Jim and Christa Schoenky. Good+ 100-200