Harken Laser Middle Unit 29/18mm Zircon Twisted Fiddle Block

The Zircon fiddle double block with a unique twist. Its slim shape slides easily along the purchase system it inhabits, to remain upright where conventional double blocks tip, twist, or tangle.

A fiddle block (twisted at 45 degrees) is a better choice where the line moves in uneven sequence around the two Zircon sheaves.