Connect two 1-1/2" diameter rack tubes end-to-end with the Gibraltar SC-GPREX Power Rack Extension Clamp. This durable clamp easily adds height to your drum rack by securely combining any two rack bars. Its sleek black finish adds a stylish touch while the wing nut screws ensure a tight fit onto both bars. Please note: this clamp should not be used to connect horizontal bars, as it may create a weak point under added weight.