HUKOER 21V reciprocating saw provides better performance and a longer lifespan. The variable speed trigger provides stroke up to 4500 times per minute . depending on how hard it is pressed. Take on wood and PVC up to 4 inches thick .and metal up to 7/8 inches thick. Suitable for pruning your tree and shrubs . demolition in small or difficult spaces . cutting plumbing pipes . making your pet house.