Full Copper Motor: The 780W pure copper motor provides a wide speed range from 500-25000 RPM for the flex shaft grinder. It features high stability and low noise for elaborate work. Also, it comes with a heat vent to keep the machine from overheating and burning to prolong its service life. High Precision Flex Shaft: The flex shaft rotary tool has a high precision 3-jaw chuck for higher compatibility and strong clamping force. Whats more, the 100 cm stainless steel flexible shaft features good extensibility for precise connections. Stepless Speed Foot Pedal: The ABS plastic foot pedal for the flex shaft hanging grinder is more secure than ordinary materials. It blocks rapid heat production and transfers. In addition, there is a screw on the pedal that can be used to adjust the constant speed and rotating speed. Multi-Purpose Accessories: This flexible shaft grinder is equipped with many accessories that can be used for cutting, drilling, polishing, deburring, etc