The box contains 6 stud extractors. Left-hand tapered helical flute. This set of 6 handy tools will help you remove studs and screws from their positions when they break. Size: 1/8-1/4; 1/4-5/16; 5/16-7/16; Very handy and useful when studs can no longer be unscrewed with a wrench. Also known as a "braid", this tool will help you carry out your project and remove damaged screws, bolts and studs. Product Description The box contains 6 stud extractors. Left-hand tapered helical flute. This set of 6 handy tools will help you remove studs and screws from their positions when they break. Package Package dimensions: 12 x 11.9 x 2.2 cm; 230 g