Harken Carbo T2 Soft-Attach Single Blocks are lashed or spliced thru the load-bearing centre of the block .  The Loop Blocks' on/off loop system sides thru the block head and over the anchor post for a secure connection.  The blocks feature composite sheaves that spin freely on Delrin ball bearings with curved bearing races.

The T2 Soft-Attach Blocks are either 29mm, 40mm or 57mm.