Ergonomic Design: Universally compatible with all racket stringing machines; features an ergonomic handle for comfortable use. Guide Badminton Lines: Helps guide tennis and badminton lines through racket eyelets; ideal for fixing net lines and knots. Main Function: Specifically designed to enlarge tight buckles for easier wire passage; assists in installing rackets and their buffer sheaths. Material: Silicone nonslip handle and a steel head plated with hard chrome; provides a smooth feel and will not damage the cable. Use scenarios Scenario 1: During restringing tennis or badminton rackets, use to thread wires through eyelets and guide lines for precise alignment. Scenario 2: Setting up or repairing court lines and knots; use to guide lines through eyelets to ensure accurate placement. Scenario 3: Assembling rackets and their buffer sheaths; use to enlarge tight buckles for easier wire passage and secure installation.