Cordless cement board shears cut through fiber cement siding and sheets. They press their pivoting blade between their fixed blades to make long, straight cuts. This punching motion leaves clean edges without breaking the board and produces larger dust particles than sawing, reducing fine-dust breathing hazards. Cement board shears are commonly used to cut backing for tile, underlay for countertops, and substrate for plaster and stucco. Cordless shears operate in areas without access to wired power, eliminate the tripping hazard of a cord, and run on brand-specific batteries.