1 Optional Hole Diameters: Different hole diameter options, which can be combined with different shafts, motors, aluminum tubes and bearings. 2 Clamping Method: The parts are fixed by clamping, which will not cause any damage to the fixed parts. 3 M4 x 0.7mm: Each 1 side 2 pillar clamping mount has M4 x 0.7mm threaded hole on the bottom surface of the two pillars. 4 Screw Fixation: When installing different shafts, motors, aluminum tubes and bearings, they can be clamped and fixed by screws. 5 For DIY Robot: The distance from the bottom of the two pillars to the center hole is 24mm / 0.94in, suitable for diy robots as accessories.

What's in the box
2 x Clamping Support