For kitchen bathroom laundry drains and pipes up to 3inches slide action chuck built into the grip shield which slides back to grip allowing the cable to work through a stoppage and forward to disengage automatic adjustment for different size cables to change to a different size cable loosen 3 screws pull front of drum off cable and load in another full cartridge double insulated motor with reverse and variable speed trigger switch drum cable maximum capacity 35ft x 38in or 50ft x