- The twist knot wire allows: Long working life. High removal capacity. - Designed for use on portable machines (angle grinders). - Appropriate for brushing large surfaces with a high removal capacity. - When the wire is worn to the bridle this can be detached by a hammer blow getting 14mm. extra trim length and a longer working life. - New exclusive and patented design threads allow an easier attachment and increases resistance, resulting in more safety for the user.