Half Round Road Stud Light In Japan With Shank-RUICHEN Road 21 06 2022 Half Round Road Stud Light In Japan With Shank Roseco Store - Round 4-Prong Narrow Half-Round Solitaire Ring The series R794 very narrow, round, 4-prong, half-round, solitaire ring (die-struck) is available in sizes from .50ct to 2.0ct in 14KT white gold and 14KT two-tone gold metals.