I just purchased 10 sections of 5R-10 cable 7/8" open wound cable 5' long. I wont to use them with a drill adaptor sometimes inside or in tight spaces. You can spin it really fast and use chain knockers ort slot type of connections for flex shaft to do high speed cleaning and removing of buildup in old drains. I can still use a camera just not while it is spinning. The sections aren't cheap $45 apiece but very durable and you only kink one at a time.