Harken LOUPS™ are ready-made soft attachments that replace heavy stainless steel shackles on racing and cruising boats. Weight savings on large offshore boats can be as much as 200 lb (91 kg).
Strong and lightweight, LOUPS™ are constructed using multiple coils of tough Dyneema® covered with Spectra®-one of the most durable materials made. An annealing process ensures loads are equal on all coils. Colored tracers on the cover specify LOUPS™ strength by indicating the number of Dyneema® coils. Most LOUPS™ configurations are made by taking the block apart. If the block can't be opened a pin called a "Dogbone" joins the LOUPS™ to itself.