This hone features a twisted steel wire shaft with abrasive globules on flexible nylon filaments. It allows you to remove any imperfections or machining marks left in your rifle's chamber. The result is a bright, wear-resistant finish that will improve the quality and feel of your rifle. Offered in a variety of cartridge, length and grit options for an array of uses. Notes: The manufacturer recommends the use of Flex-Hone oil for use with these hones. It is specially formulated for use with Flex-Hone hones