2023 China Manufacturer Factory Price BTON200 Hand-Held Air Pneumatic Electric Electrical Stone Rock DTH Button Bit Sharpening MachineHand held pneumatic button bits grinder BTON200 Rotation speed:20000RPMMotor power: 1.5 KW Work pressure: 5-7 bar (100 psi)Air consumption: 2.0 m3 / min (50ft3/min) M