EXTENSION ROD DESIGN, FOR DEEP POLISHED Rugged and durable, practical and convenient. Designed for High Speed Grinding & Polishing In Hard to Reach Area, Professional design, Has interchangeable collets allowing you to use 1/4" and 1/8" shank tools. Application: Handy tool for grinding wood, furniture, sculptures, metal, stone with different grinding bits. Ideal for removing solder joints and rust spots on metal products. Light weight, low noisy but powerful motor (free speed: 25,000rpm)and long service life.Rear exhaust can direct airflow from working surface. Specification: Collect Size: 6mm(1/4in) & 3mm(1/8in) Air Inner: 1/4inch Speed-on Load: 22000RPM Overall Length: 281mm (11 inch) Working Pressure: 90PSI Air consumption: 4CFM Recommended airhose size: 3/8-in 1/4'' & 1/8'' COLLET The power die grinders have interchangeable 3MM & 6MM chucks, allowing use with 1/4" and 1/8" shank grinding heads and abrasive tools. PUSH THE BOARD SWITCH Air Die Grinder adopts a push plate switch setting to easily control start and stop; the ergonomic handle is easy to use and reduces hand fatigue. SPEED SWITCH When straight die grinder needs to adjust the speed, use a screwdriver to easily adjust the knob, control the speed as you like, and easily cope with different working conditions. 1/4'' AIR INLET Air inlet of the pneumatic grinder is equipped with a filter to prevent foreign matter from entering and damaging the movement. It is also an oil injection hole. Use one wrench to hold the grinder head, the other to unscrew the collet cap. Pneumatic die grinders are equipped with 3mm and 6mm chucks. Take the cap off, then you can change the collet or grinding bit. The air-operated angle grinder body is small and light, easily to use. Lastly, use the wrenches to tighten the cap. The chuck of the angle die grinder is made of tungsten steel, durable and efficient. Package including: 1 Air Die Grinder2 Wrenches1/4-in Collect & 1/8-in Collect8pc Abrsaive Grinding Head