Multi functional high-power electric hammer, engineering home decoration, hammer/drill/pickaxe/shovel/pass function, one machine with multiple functions, one key switching Precision steel chuck, quick installation without falling off drill bit, quick installation, firm clamping, preventing drill bit from falling off during operation 360 ° rotating auxiliary handle, adjustable grip method, suitable for various work needs Continuously variable speed, speed locking, thickened alloy, quenched gears Strong heat dissipation, increased ventilation and heat dissipation ports, fast heat dissipation, and long-term operation without burning the machine, Manufacturer: TRDEWR