3/4" X 3/4" Precision Sleeve Coupling Two-Piece Split Clamp-Type, SteelAssure precise shaft alignment Axial runout less than . 001 TIR Two pieces for convenient assembly and adjustment Includes standard keyway Smooth bore protects shafts from damage Staffords exclusive Precision Sleeve Coupling features a solid center section that provides a close tolerance fit on ground shafting, includes a keyway, and the Accu Clamp design which incorporates integral self centering clamping collars at both ends. To assure precise shaft