Each bolt extractor is made of high-hardness chromium-molybdenum steel, which has excellent durability and longer service life. Ultra-thin design allows you to enter a narrow space. Suitable for places that others not miss. The internal thread with reverse spiral groove is designed to bite to provide maximum grip. The more rotation, the tighter the sleeve grip. Hexagon adapter suitable for hand tools, air or electric tools, easy to disassemble. blow-molded shell is easy to store and carry. Name:Broken nut extractor set Quantity:9pcs/set Colour:Black & Silver Material:-V Package Contents: 1 * Broken nut extractor set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.