Climax Metals 2C-050-ZX10 Two-Piece Clamping Collar, Zinc Plating, Steel, 1/2" Bore, 1-1/8" OD, 13/32" Width (Pack of 10) Two-piece clamping shaft collar for applications requiring a stronger holding power and higher axial load capacity than setscrew or one-piece clamping collars Effective on both hard and soft shafts Steel for weldability and rust resistance with zinc plating for better resistance to corrosion than black oxide steel Includes socket-head cap screws for securing the collar onto the shaft Operating temperatures range from -17 to 121 degrees C (0 to 250 degrees F)