Specification: Air Pencil Die Grinder: Max RPM :25000RPM Max Air Pressure:0.6Mpa Air inlet: 1/4" Collet size: 1/8"(3mm) Length of pen :210mm Material: Metal + Plastic Package Include: 1 x Suit Note: Please allow 1-2mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Please be carefully check the goods appearance, size, shape and then compare your original goods before ordering, thank you.