Higher Demolition Performance: The optimized hammer mechanism with a cylindrical striker delivers a high impact energy and efficient impact rate, resulting in higher demolition performance. Superior Working Comfort: Due to the large heavyweight (cylindrical) striker, the chisel easily cuts into concrete, which makes users feel more comfortable during demolition work. Optimized Hammering Mechanism: Secures sufficient air cushion and improves hammering movement, decreasing piston reaction force generated during hammering, resulting in significant performance benefits.