Material: Steel 10 bolt extraction sockets: 9, 10, 11, 12, 13, 14, 15, 16, 17, 19 mm Dimensions of the case: 14 x 10 x 3.5 cm (L x W x H) Delivery includes: 10 bolt extractor sleeves, 1 lever (length: 9 cm) This set of 11 bolt extractors is perfect for loosening damaged bolts and nuts. This professional tool kit is ideal for commercial or occasional use. It has been specifically designed to remove damaged or corroded nuts without the risk of damaging the bolt thread. Made of high quality steel, this puller set is strong and durable. Its innovative design provides maximum gripping power for the extraction of damaged fasteners. The Complete Bolt Extractor Kit comes in a sturdy case for easy storage and transportation. Delivery includes 10 bolt extractor sockets and 1 lever.