This is a complete set of thirteen antique double-fluted auger bits designed for use with a manual hand brace. Each bit is constructed of forged steel with a traditional Jennings-style double-twist flute, terminating in a lead screw and two cutting spurs. The set is housed in its original tiered wooden storage case, which features a grooved interior to secure the tools and brass hinges. Measurements: 1/4 in; 1 in.