Material: Metal Drill Collet Size: 0.5mm / 1.0mm / 1.5mm / 2.0mm / 2.5mm / 3.2mm Motor Diameter: 28.6mm / 1.13 inch are complete and practical. Use twist drill as a mini hand drill for ABS board, aluminum sheet, cardboard drilling. Color: Silver + Gold Package Included: 2 x 12V 500mA Motor 2 x Axles 2 x 0.5mm Drill Collet 2 x 1.0mm Drill Collet 2 x 1.5mm Drill Collet 2 x 2.0mm Drill Collet 2 x 2.5mm Drill Bit collet 2 x 3.2mm drill collet Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.