... / B4/ A4/ B5/ A5): The base extends to the end for single forming, without crack, without jointing, the line concinnity, the ... B5/ A5): The base of paper cutter extends to the end for single forming, without crack, without jointing, exterior fluency concinnity, ... the scale line made by saturation treatment for twice, quite durable, sharp knife-edge, beautiful sculpt. manual ...