This Ruland double friction bearing universal joint with set screws has 11mm x 11mm bores, a 22.1mm outer diameter, and a 111. This double friction bearing universal joint is manufactured in the USA.
The addition of keyways allows for increased torque capacity and prevents the coupling from slipping on the shaft when over torqued. Keyed Clamp Bellows Cplg, Bores 12x12mm, OD 41.3mm, L 50.