One of the only threads actually designed and manufactured specifically for beaders, K.O. is a strong, fray-resistant and non-stretchy thread made in Japan. It works incredibly well in laddering, off-loom and on-loom bead weaving and just about anything using seed beads. It will itt needles from Size 10-13 and just seems to be built to last without fraying. It is smooth and is pre-waxed on spools of 55 yards. Because it is more structured than Nymo, you can use the tail as a self needle. If you are laddering gemstones or do not want to use a needle, K.O. is pretty darn perfect for the project. It also takes well to singeing with a Thread Burner. The size is comparable to Nymo B. Available in 18 subtle colors that will blend in every project.