IKN 6mm Thread Metal Single Tremolo Arm Trem Bar Whammy Bar for Electric Guitar Tremolo System,Chrome with Black Tip Fits for most electric guitar bass single tremolo bridge system. Excellent value accessories,single arm tremolo whammy bar. Thread size is 6 mm in diameter,and bar size is 5.3 mm in diameter. High quality metal plated chrome body and plastic black tip. Package includes:1pcs whammy bar.