This is a handy set of round files, originally intended for cleaning the tips of torch welders, but absolutely perfect for filing string slots in nuts and bridges. The standalone set includes a range of 13 sizes (from 0.4mm to 1.6mm).Unlike most standard tip cleaners, these feature a longer shaft length with a grinding length of 25 mm and a length of the 30mm handle, making them easier to use for filing. string slots. Please note: these files, especially the smaller ones, have a thin diameter and bend easily. As such, some care is recommended when using them, so they last you a good while. These longer shank files are easier to use than the shorter ones commonly available at DIY stores. Material: Metal wires Size: 0.4mm / 0.5mm / 0.6mm / 0.7mm (2 pcs) / 0.8mm / 0.9mm / 1.0mm (2 pcs) ) / 1.1mm / 1.2mm / 1.4mm / 1.6mm, grinding length 25mm and handle length 30mm. About the sandpaper: the sandpaper allows you to adjust your saddle and nut height at any time, you can also use it to polish