Item Type: Screwdriver Sharpening Guide Material: Iron Mainly used for grinding watch screwdrivers Usage: When the screwdriver is put into the sharpening guide for grinding, the screwdriver should be kept in a horizontal position on the sharpening guide before grinding.  1?��Not easy to rust or corrosion, designed with two metal bearings, save time and effort. ?2?��Auxiliary grinding screwdriver tools, long service life and convenient for repairing. ?3?��Suitable for fixing the screwdriver in the grinding process, which is an essential tool in repair. ?4?��Make screwdriver more quickly to be maintained, suitable for watch screwdriver repairing and saving time. ?5?��Perfect for amateurs, watchmakers and clock repair shops, compact and portable.