Features： 1、Cut Into Different Lengths : Circlip grooved hex shaft can be cut into different lengths. You can also use a metal cutting blade to cut the Φ8mm stainless steel circlip grooved hex shaft to your own customized length according to your needs. 2、Advantages: The circlip grooves hex shaft has the advantages of round shaft and hex shaft, which can be used with other robot parts with matching hex holes. 3、Effectively Prevent Slippage: Effectively prevent parts from rotating and slipping on the hex shaft, so that the force on the parts is more even, and greatly increases the friction and the efficiency of the transmission or driving force. 4、Application: Can pass through a bearing with an inner diameter of 8mm and use with other robot parts with matching hex holes, which greatly enhances the load bearing and transmission capacity of the robot parts. 5、M4 Thread: A circlip grooves hex shaft with a circlip grooves and an M4 thread, which makes easy to restrain the axial movement of the bearing in the combination. Specification： Item Type: Linear Rail Rod Shaft Model: 4106-4008-3120 Material: Stainless Steel Purpose: Industrial Robot Center Thread Aperture: M4 Package List： 1 x Hex Shaft