Description: Includes a forward and reverse function screwdriver Extension shaft for adjustment Compact, lightweight and easy to use This screwdriver is an ideal for watch repair, eyeglass repair, and hobby miniatures where fine precision is required This product would be ideal for a mechanic or a DIY Specification: Material: Chromium Vandium Alloy Steel Size Chart: Diameter of nut: 6.2mm/0.24'' (This size of nut will be suitable for the tool) 0.25mm/0.01'' Drive Shank Screwdriver More details may be seen in the picture Package Includes: 1 Piece screwdriver