TB Wood's Sure-Flex® couplings use a rubber (EPDM), neoprene, or Hytrel sleeve and have exceptional torsional flexibility. Their 4-way flexing action absorbs virtually all types of shock, misalignment, and end float. With Sure-Flex couplings, the need for lubrication and maintenance is eliminated. As a result, these couplings provide clean, dependable, and quiet performance for a variety of applications. Product Features Lubrication-free design provides quiet, reliable performance Flexible sleeves available in EPDM, Neoprene, and Hytrel Fast and easy installation without bolts, gaskets, covers or seals Uniquely designed teeth and lateral flexibility accept both parallel and angular misalignment without wear Choose from an extensive offering of sizes, using BTS, bushed, clamp and spacer flanges Four-way flexing action absorbs extreme torsional shock and vibration.