sku=G46-118,select_size=Michele Trephine 6 1/4" graduated|sku=G46-120,select_size=Michele Trephine 6 1/4" shaft 5/16 O.D. graduated 1/4" to 1 1/4"|sku=G46-116,select_size=Michele Trephine 6 1/4" shaft 3/16 O.D. graduated 1/4" to 1 1/4".