The high-strength composite T2™ is the first block with no metal shackles or rivets. It is used for traveler controls, mainsheets and vangs, cascades, bridles, and other systems where small, lightweight blocks are called. The T2 can be tied, spliced, or lashed to almost anything. The length of the Spectra® line is included. Spectra® is a registered trademark of Honeywell International, Inc.