48 Split Ring Fishing Lure, Lanyard, Dog Tag Connector Polished Brass 8.5mm Made in the USA O.D. Tolerances: + .015 - .005 Approx. thickness .068 in / 1.73 mm Outside Diameter .334 in / 8.48 mm Polished Brass Approx Inside Diameter .242 in / 6.15 mm