TW? Tighter weave! You can cut many of these truly 100% wool items down to a 4 and up to an 8.5 or hand torn with confidence and without fraying. If you are a fine hooker, these new items will give you a much broader selection of textures to use in your projects. If you use our wool for appliqué, trees, proddy, shirring, upholstery, etc., you will notice tighter edges on even more intricate patterns.