The 11pcs nut bolt extractor socket set includes 1 remover and 10 sockets (9-18mm), used to remove damaged bolts and nuts. Features: Specially hardened sockets with corrosion protection are designed for removing damaged bolts and nuts. The spiral socket design allows a secure connection in the roundedoff fastener outside to be drawn. The innovative spiral digs into the head of a damaged screw or nut, allowing it to be easily loosened. The drive size is about 3/8in (9.5mm), with stable performance and long service life. Comes with a carrying box for easy storage. Specifications: Material: Steel Package Weight: 650g / 22.93ounces Package Size: 170 * 125 * 55mm / 6.69 * 4.92 * 2.17in Packing List: 1 * Remover 10 * Sockets (9-18mm) 1 * Carrying Box