Features: All the bolt extractors are precision engineered to easily extract damaged bolts, nuts and screws even if they are stripped, rusted or for frozen. Made from high hardness chrome molybdenum steel for durability. Tight grips and won’for t let go, the internal thread design provides excellent torque, the more you turn, the tighter the socket grips. A toolbox with designated slots to keep every socket neatly organized and easy to carry. 13 pieces 3/8 inch drive bolt & nut remover comes with 3/4"(19mm), 11/16", 17mm, 5/8"(16mm), 9/16"(14mm), 13mm, 1/2", 12mm, 7/16"(11mm), 10mm, 3/8", 5/16"(8mm), 1/4", and hex adapter. Specifications: Material: Cr-Mo Steel Size: 3/4"(19mm), 11/16", 17mm, 5/8"(16mm), 9/16"(14mm), 13mm, 1/2", 12mm, 7/16"(11mm), 10mm, 3/8", 5/16"(8mm), 1/4", and hex adapter Drive: 3/8“ square drive Package Includes: 13x Bolt & Nut Remover 1x Hex Adapter note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.