This bag of hardware is what you need to attach various Lankota cab monitor brackets to others. Each contains a ⅜" x 1" carriage bolt, ⅜" flat washer and ⅜" plastic wing knob for securing. In addition, a ⅜"" toothed washer is included to keep brackets from spinning and a ⅜" carriage washer is enclosed to space the carriage bolt on thinner brackets.