Features: Aluminum alloy construction,corrosion resistant and lightweight. Reverse nuts to remove the alarm easily when your bite alarm(not included) is too tight. Easily twist the bottom nuts to extend the length as you need. M3/8 threads fit for most bite alarm and fishing rod rest head. Great replacement for your buzz bar. Specification: Type: 2 Heads / 3 Heads (optional) Length: 175-215mm / 285-400mm Material: Aluminum alloy Weight: approx. 109 - 166 g / 3.8 - 5.9 oz Package List: 1* Fishing Buzz Bar