Magnetic Drive Guide Hex Chuck Screwdriver Bit Holder Extensions 1/4 3/8 5/16OOTDTYComs: Made of chrome vanadium steel materials, practical and . Length: About 90mm / 3.54in, easy to carry and use. Used for screwdriver, drill bit, batch head and other conversion tools. The hex chuck can fit for drill rigs, 1/4" 3/8" and 5/16" impact drivers and handheld controllers. The sleeves can be reversed for work, suitable for hard-to-reach narrow spaces. Specification: Material: Chrome Vanadium Steel Stainless Steel Length: About 90mm/3.54in Type: A/B/C/3pcsPackage Included: 1x Magnetic Drive ConductorNote: 1. Please allow 1-3cm errors due to manual measurement, please make sure you do not mind before ordering. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.