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The VR-model roller-retainer is used between two tracks or guides to effectively carry loads along various axes depending on the installed orientation of the guides or tracks. The unique retainer design realizes an effective slide-contact 1.7 times longer than conventional types, and the narrower inter-roller pitch plus double hardness make the rollers six times more durable. In addition, the VR is designed to retain constant lubrication for prolonged, smooth action.