1 hex nut driver that is both suited for MakerBeam, MakerBeamXL and OpenBeam products. The hex nut driver is suited for standard M3 nuts in combination with different bolt lengths. Our hex nut driver is suited for both the 6mm and the 12mm length bolts we sell. The hex nut drivers comes automatically with a MakerBeam Starter Kit, MakerBeamXL Starter kit and an OpenBeam Precut Kit.