1-1/2 INCH THREAD LENGTH; 1.5 THREAD LENGTH - DECIMAL; 1-1/2 THREAD LENGTH - FRACTIONAL; 1/4 INCH NOMINAL DIAMETER; 20 TPI; 1/4 NOMINAL DIAMETER - FRACTIONAL; .25 NOMINAL DIAMETER - DECIMAL; FLAT HEAD STYLE; BIT SIZE #3; PACKAGE TYPE BOX