The T-block is used for creating “T”junctions for partition walls. The block can be used as both a corner block and a T-block. This block has one two-foot section of top V-groove turned 90º and one two-foot section of bottom V-groove turned 90º allowing it to interlock with blocks running above and below it. Because the T-block overlaps the block below it by 2 feet, the 5 foot length will allow you to maintain your running bond after turning the corner.