1. Material: engineering plastic 2. Weight: about 39 grams 3. Size: about 4.5x2.2 cm, M6 screw hole 4. Scope of application: connecting rod 5. Features: turn the knob directly, it will run idly and cannot be adjusted. You need to use the key to match the knob to rotate normally for adjustment, easy to install, anti-theft and wear-resistant
