Abstract: Provided are a phosphate coated stainless steel wire for cold heading and a self-drilling screw using the stainless steel wire. Since a phosphate coating is formed on a surface of the stainless steel wire, cold headability and clamping force can be significantly improved, and since outer appearance is improved, a post-process after a heading is not required.

Abstract: The present invention relates, in general, to a character management service system and service method using the same and, more particularly, to a character management service system and service method using the same, which allows the characters of online games to selectively develop offline, thus improving a user's satisfaction. In the method of providing a character management service, attributes of a user's own characters and characters to be developed, and a method of distributing the attributes are registered. A corresponding user downloads mini games, generates data about attribute variations, such as experience levels and ability levels, through play of the mini games, and receives the attribute variations from the mobile communication terminal. The data about the attribute variations according to factors are classified, the classified data are distributed to a plurality of characters registered by the user, and corresponding characters are developed.