Operation upgrade, capable of slotting red brick, concrete and cement, and multi-function one-button switch. Experience upgrading, high-power powerful hammering, high-precision copper-core motor, strong power, high temperature resistance, long service life. Safety upgrade, rapid wall breaking in 30 seconds, high strength collet, bit not easy to fall off. Design upgrade, three-dimensional cooling system, dust-proof squint design, good ventilation effect, and more stable motor performance 360-degree rotation auxiliary handle, convenient for use from different angles., Manufacturer: QAXRZCUCD