Feature: 1. Won't Cause Any Damage To Fixed Parts: Clamping support can be combined with different shafts, the parts are fixed by clamping, the advantage of this fixing method is that it will not cause any damage to the fixed parts 2. Free To Construct Complex Angles: The 2 side 1 column clamping mount is free to construct complex angles. Each 2 side 1 post clamping mount has a M4 x 0.7mm threaded hole on the bottom surface at both ends for fixing the 2 side 1 column clamping mount to other parts 3. Maintain Standard Distance: When installing the shaft, can be clamped and fixed by screws. The total width is 43mm, and the distance from the bottom surface of the two ends of the column to the center hole is 24mm, so that the part combination can maintain the standard distance between the robot parts 4. In Alignment With Groove Space: Clamping support can be used in alignment with the groove space of the 3120 series U shaped beam and other plates with a distance of 43mm 5. For DIY Robots: Clamping rod support is suitable as accessories for DIY robots, industrial machinery and equipment, etc. 6. Anodized Aluminum Material: Surface adopt aluminum material after anodized treatment, possess good quality and durable Specification: Item Type: Clamping Rod Support Material: Aluminum Surface Treatment: Anodic oxidation treatment Thread Model: M4 Total Width: Approx. 43mm / 1.69in Distance From Column Bottom At Both Ends To Center Hole: Approx. 24mm / 0.94in Model Center hole diameter(approx.) 3402-0043-0006 6mm / 0.24in 3402-0043-0008 8mm / 0.31in 3402-0043-0012 12mm / 0.47in 3402-0043-0014 15mm / 0.59in . Package List: 3 x Clamping Rod Support Note: Please match the appropriate size before use.