Desktop mini drill press, suitable for friends who like DIY. The shell of this electric adjustment device is quite tight, so you need to pay attention to the welding wires inside when installing it. The shafts used are 10cm in diameter and 20cm in length, and 10cm in diameter and 12cm in length. The 2GT synchronous pulleys have 20 teeth with an inner diameter of 3.17mm and 60 teeth with an inner diameter of 10mm. The belt is 260mm long.