They feature a black oxide coating, oscillating head, and sliding cross pin handle. This kit includes four of our most popular sizes - 540A Series C-Clamp 0 - 2-1/2” Opening Capacity, 540A Series C-Clamp 0 - 4” Opening Capacity, 540A Series C-Clamp 0 - 6” Opening Capacity and 540A Series C-Clamp 0 - 8” Opening Capacity.
