This durable metal Silver Tungsten handle holds single row slant manual needles in the following sizes; #5fine, 5, 8Fine, 8, 10Fine, 10, 12Fine, 12, 14Fine, 14.(Thickness of needles; 0.25mm = fine, 0.35mm = standard) Fine size needle 0.25mm diameter are great for creating the individual hair stroke, 3-D hair stroke, and lash enhancements. Perfect for very intricate detail work. Standard size needle 0.35mm diameters are great for eyeliners, feathered brows, powdery look brows, solid brows, lip liner.