TOOL TRON-Micro Screwdriver With Keychain. This micro screwdriver. will help you get into those hard-to-reach areas for sewing machines. Available in both flat head with a 3/4 inch handle. This screwdriver is a perfect fit for crafters with large fingers and for use in any tight area. This package contains one 1-1/2x1 inch micro screwdriver. Imported.