Revata Engineering manufactures Kelly Wipers using special rubber compound with a bonded steel ring for extra strength and wear, which offers tremendous resistance and resilience to cutting, tearing, abrasion, water and oil-based muds.   These Kelly Wipers extend the life of the Kelly bushing by keeping it clean from the mud and abrasive substances.   The Kelly Wipers are available for different sizes hexagonal Kellies to fit the bushings.