Anchor Penta Modular 6A Bell PushAnchor Penta Modular 6A Bell Push. The quality of Anchor Switches in what really helps us in staying ahead of our competitors. Anchor Penta Modular is a brand new offering from Anchor Penta, India’s first piano switch. Carrying the trust of unparalleled safety, Anchor Penta Modular 6A Bell Push comes with a bold yet brilliant aesthetic appeal.