Product Description The Arrow genuine 1/4-inch staples are designed for use with the JT21 and JT27 models. Measuring a 1/4-inch leg length and 7/16-inch flat crown width, they fit Arrow JT21, JT27, TT21, Easyshot 5650, and most Stanley light duty guns. 1000-pack. From the Manufacturer The Arrow JT21 1/4 inch staple, each box has 1,000 pieces. Narrow Crown thin wire staple, Fits Arrow JT21, JT27, TT21, Easyshot 5650, most Stanley light duty guns.