Neoprene Drive Rollers | McMaster-Carr
One-Way-Locking Threaded Idler/Drive Rollers. These rollers spin freely in one direction and lock to transmit power in the other. Made of neoprene rubber, they are oil, flame, gasoline, and weather resistant. Idler direction is clockwise when facing the roller end. For technical drawings and 3-D models, click on a part number.