Each chrome-alloy steel file has twin 4 cutting edges. Among our most popular tools, these professional files help you get the job done quickly and correctly. StewMac tech advisors specify this set of 6 files to match Medium Gauge electric guitar strings (one file each in the following cutting widths: 0.010", 0.013", 0.016", 0.028", 0.035", and 0.046"). Match the file to the string gauge. Choose a file of the same size as the string, or no more than a few thousandths wider.By rocking the file side to side, you can widen the slot to fit a slightly wider string. TIP: Nut slotting files work great for metal Tune-o-matic bridge saddles. After filing, polish the slot with abrasive cord to remove file marks. The item "StewMac Nut Slotting Files for Electric Guitar Set of 6 For Medium Strings" is in sale since Friday, May 12, 2017. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Guitar Builder/Luthier Supply". The seller is "stewart-macdonald" and is located in Athens, Ohio. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Viet nam, Uruguay, Barbados, Brunei darussalam, Bolivia, Ecuador, Egypt, Guadeloupe, Iceland, Jordan, Cambodia, Sri lanka, Luxembourg, Monaco, Macao, Nicaragua, Peru, Paraguay, Russian federation, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Bangladesh, Bermuda, French guiana, Guernsey, Gibraltar, Jersey, Cayman islands, Liechtenstein, Martinique, Maldives, Oman, Pakistan, Reunion.