Features -DC motor can run on DC voltage from 3-12V with 1A electric current.light , handy with low noise. -Universal M8 drill chuck allows to clamp 0.5-3.5mm twist drill bits.The chuck also fits some Grinder. -10Pcs twist drill bits contains0.5/0.8/1.0/1.2/1.5/1.8/2.0/2.3/2.6/3.0mm, 1pcs per size. -3-12V 1A adjustable power supply,rotating the button , easy to get the suitable voltage for motor. -2.8mm Plug spring terminal is good choice to connect the motor with power supply.Quickly replace and adjust. -Idea for your DIY projects.Fits for drilling on soft material like thin wood board,PCB,PVC plastic,aluminum ect. Specification 1.Motor: Motor will run on DC voltage from 3-12V 1A No load speed 18000-35000 RPMNo load current - 1A.shaft diameter:2.3mmMaterial: Drop Forged #45 Carbon SteelShaft length: 12mm.Motor diameter: 28mm.Motor height: 47mm. 2. M8 Drill Chuck: Capacity: 0.3 to 3.5 mmLength: 18.5mmInterface :7.8mm(M8)Diameter: 13.2mmColor: BlackMaterial: Drop Forged #45 Carbon Steel 3. Twist Drill Bit Set: Material:High Speed Steel Size:0.5/0.8/1.0/1.2/1.5/1.8/2.0/2.3/2.6/3.0mm(each size 1 pcs) 4.Power Supply Type: Adjustable Voltage 3-12V Power cord length:125cmShell size:75x50x35cm (Length x width x height)Input:AC 100-240V 50/60HzOutput:about 3-12V 1AConnector interface size:inside dia :2.5mm outside dia:5.5mm length:12mm Plug Choice: EU/US 5.Plug Spring Terminal Length: 20mm Fits for 2.8mm motor terminals,perfect fits our power supply (There are 2-3% difference according to manual measurement,please understand) Package Includes 1 x motor drill kit (Packed Safely in Bubble Bag.)