High quality: It is made of high hardness chrome molybdenum steel + nickel-plated surface, which is durable and prevents rust. Easy installation: a set of 2 pieces: this screwdriver bit is designed to quickly and efficiently tighten or loosen nuts, bolts, hooks when installing blinds/hurri panels or other projects, and save a lot of time and change work quickly. Brain hole Wide Open: All bolt extractors are precisely designed to hold firmly and not lose your hands. Internal thread provides excellent torque. The more you turn, the tighter the sleeve, saving you time and getting installed quickly. things. Wide use It can be used with 12mm, 18mm hex nuts and is very suitable for installing hurricane blinds or other items. It can quickly and effectively fix or loosen wing nuts, bolts, C-shaped hooks, Q-shaped hooks and eyelet hooks. Dimensions: 2 pieces with 1/4" hex handle, drive bolt and nut extractor are equipped with (12mm), (18mm), 4 slots size 5mm, 8.2mm. Can meet the size you want.