Available in small (1 3/8" - 1 5/8") or large (1 7/8" - 2").  These oar stops will fix your blade angle, when pushed up to the stop in the oar lock, with a rounded stop for greater oar movement than the traditional oar rite.  Pull oars in for "featherability" or check out the convertible oar rites.  Price is for ea., and is the same for small or large.