Size: 41.8mmX 30.5mm Shank diameter: 3.17mm Shank length: 62mm High precision mini desktop drill fixed clamp 3.175, applies to the shank is 3.175 drill, high precision within 2 silk. Drilling stable, suitable for precision drilling purposes. Fixed shank drill is 0.1 to 3.175 shank are the same large 3.175mm. 100x80x180mm, column 12mm, drilling stroke 12mm chuck on the table height of 70mm. Net weight of about 650 grams Table drilling materials are made of solid material, the main body of aluminum alloy, spindle bushing brass, spindle made of stainless steel. Workmanship is very fine, the parts are CNC machining, parts structure according to industrial-grade structure production, at no cost only for enthusiasts enthusiasts to create the exquisite mechanical ornaments handicraft collection! Collection value is greater than the actual use. Voltage 3 to 12v, soft metal can be drilled 1 to 3mm hole. Supplied with 12v2A adjustable power supply speed adjustable