2pcs 7 x 7mm Motor Shaft Rigid Brass Sleeve Coupling Connector + Tighten Screws The coupling is great for connect your motor of 8mm shaft to the wheel. Widely used in hardware,molds, and the occasion of the mechanical transmission. 2pcs 7 x 7mm Golden Brass Coupling Rigid Shaft Coupling Motor Accessories 2pcs 7mm To 7mm Brass Shaft Coupling Rigid Coupling Coupler Motor Connector Package Include: 2 x Motor Rigid Coupling 1 x Allen Wrench 8 x Screws