Had a clog in our kitchen sink that started about 5 feet down. Couldn’t dislodge with our 25 foot snake so got this product and was able to puncture through the clot and clean the pipe all the way down to the mainline. I ended up replacing the pipe around the 5 foot mark and sure enough it was the 75 year old cast iron causing issues, the inside of the pipe had extremely tough residue, impressed the snake could push past this! Had to start with bit attaching a piece to the front of the snake then subsequently adding the front pieces to try and break up the clot with additional passes. I also used it to clear out our backyard drain which periodically gets clogged and can cause some mild backyard flooding. Love this product! Thank you! Maybe I’ll invest one of your camera scopes next 😏