Harken Micro Swivel Cam Base w/16 mm disc

Stand-up bases allow a wide range of blocks to be held upright, rotating freely, even under load. The ball-and-socket design allows blocks to be tilted up to 45 degrees and rotate freely. The 460 and 461 bases (heavy-duty versions of the 010 and 029) have stainless steel reinforcement plates to handle 57 mm and 75 mm Carbo blocks.