The LC01 Super Clamp by Ulanzi is a dual-head mount that fits both square and round tubes. The compact clamp has a high-grip silicone build that ensures great stability and supports up to 11 lb. The LC01 utilizes two knobs to adjust the tightness, providing better access and comfortability. One clamp can hold up to 1.9" (48mm) round tubes, while the other can hold up to 1" (25mm) square tubes.