Based on the same design as the Ti-Tape micro-sized titanium tape measure, this Special Edition Cu-Tape is identical in every way except it is made from tellurium copper. The Cu-Tape is simply the smallest copper tape measure in the world. Slightly larger than a US Quarter, it is the perfect tape measure for everyday carry. Why? Because it is super TINY, ultra-durable, and extremely lightweight. It also includes a removable keychain clip, so you can attach it anywhere to keep it with you at all times. As if that wasn't enough, the user-replaceable 3' measuring tape ensures you will never have to buy another portable tape measure again. Ever.