This homemade tape spool has come in handy more times than I can count. It holds 6ft of both duct tape and electrical tape. (there is also a powerful magnet stuck to the bottom that claims to be able to hold 45lbs). While i have not really used the magnet that much, I can't believe how many times I've used the electrical tape and duct tape. It was well worth the few dollars it cost to make. I use it often enough that I keep it clipped to a carabiner on my belt.