1. Simple assembly, easy to use, affordable price with high quality; 2. Great tool for DIY crafting projects; compatible with wood, aluminum, PCB, acrylic board, and plastic materials; 3. Universal keyless chuck allows quick and easy accessory bit changes on your grinder; Motor Specifications: - Rated voltage: 12 volts DC - Operating voltage range: 312 volts - No-load speed: 18,00035,000 RPM - No-load current: 1A - Shaft diameter: 2.3mm Golden Chuck with 5pcs Collets: - Type: High precision - Drill collet sizes: 0.5mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm - Backshaft diameter (matches motor shaft): 2.3mm Twist Drill Bits: - Design: Straight shank - Diameter options: 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.3mm, 2.6mm, 3.0mm (one piece each) - Color: Silver - Material: Metal Package Contents: 1 x Motor 1 x Golden chuck with 5pcs collets 1 x Small wrench 10 x Twist drill bits Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement tolerance: 13 cm.