The VB-1 3 inch V-Block is designed to hold larger objects. Each block comes with one clamping arm that can be removed and repositioned by accessing one of the threaded holes along the base. Additional clamping arms are sold separately.These two blocks are designed to offer a variety of mounting options. Accessing the counterbored 1/4-20 (M6) holes, they can be attached directly to tables, tip/tilt stages, translation stages or post mounted. There are also holes along the side of the base for direct mounting to 340-RC and 370-RC Rod Clamps.