This is a Lot of 4 Marine Grade Stainless Steel Heavy Duty Tubular Turnbuckle, Brand New, which extends from 9 in. up to 12 in. between pins. These are high quality parts made in Norway. The rod tread is 7/16"-NP20 and the pin are 7/16" diameter. It comes with stainless steel locking nuts and washers. These turnbuckles are ideal for use on standing rigging of a large sailboat. Pick up only from Cobble Hill.