Product review (3 stars): watch out
i accidentally reversed the drill and the little brush came off somewhere in over 20 feet of underground vent pipe. i was lucky the rods didn't come loose in the pipe and i was lucky again when the vac pulled the brush up with a huge clump of lint. so i recommend being very sure the drill is always in forward before the trigger is pulled. the kit will do the job but since its economically made for the occasional home job and screws together as its being fed through the pipe, the user has to be cautious or there could be a bigger problem than just lint in the vent pipe.