This is a roll of 1.8in x 75ft double-sided fiberglass tape. It has an extremely sticky adhesive and is virtually impossible to tear or shear through normal combat use. We use it around the shop for capping the ends of cores and layering between pieces of foam for our stabbing tips because it prevents the tip of the core from cutting the foam and reducing the life of the stabbing tip. We also use it for reinforcing the cuts for the handle straps in our foam shields to prevent the straps from weakening the foam over time.
The double-sided nature of this tape also makes it a great, long-lasting alternative to DAP if you're making flatblades. It has no set time and is perfect for rapidly making repairs or prototyping weapons.
This stuff is just plain excellent. Can't say enough good things about it. It's heavy, though, so don't use it to cover your sword or anything. One roll of this stuff should last you though many, many weapons.