We recommend 1/2" (13mm) Flex Shaft drain cables for tough 3" to 8" descaling and root cleaning jobs. 1/2" cable can be pushed further out for those distant, harder to reach root infiltrations under the city streets. 

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Our 1/2" Flex Shaft cable will pass through a 2" clean-out that goes into a 3" drain with minimal deviations as it works its way to the main drain. We do not recommend 1/2" cables when there very close deviations in the 3" drain, however it will work well through standard gradual 3" bends. 

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Drain Rehab Solutions Flex Shaft cables can be powered by battery drills, but we recommend using an electric drill with a Renssi Clutch Kit.