ITEM NAME:Screwdriver Sharpening Guide Watch Jewelers Repair Sharpener Watchmaker PHX Descriptio n Features : Can hold handles from Within 5mm in diameter. Adjustable screw holds precision screwdriver in place at the proper angle for sharpening. Great for sharpening precision screwdrivers,fixing damaged blades,etc. Describe : Material: Alloy Color: silver Dimensions: 5.5cm wide, 0.5cm aperture, screwdrivers with a diameter of 5mm or less Product List : Sharpener*1 How to use: 1.Place screwdriver through center of sharpener. 2.Adjust screw to securely hold in place. 3.Roll sharpener back and forth over a sharpening stone. Note : It is only the function of the auxiliary fixing screwdriver, and does not have the function of grinding the screwdriver. We offer you what you need! Screwdriver Sharpening Guide Watch Jewelers Repair Sharpener Watchmaker Tools.Roll sharpener back and forth over a sharpening stone. Place screwdriver through center of sharpener. Adjustable screw holds precision screwdriver in place at the proper angle for sharpening. Product List : Sharpener 1.