東漢玉雕以管鑽為之, 而非傳統的鉈機. 因此, 東漢玉器表面顯示圓圈痕跡. 傳統的鉈機工法, 玉雕的痕跡是兩端尖銳淺層, 中央較寬而深, 轉彎處有毛渣痕跡. Tube cylinder drilling tool instead of traditional round plate tool is used in the Eastern Han Dynasty carving. The result is that round carving trace is appeared. For the traditional round plate tool, the trace of carving is shown point shape at both ends and wide line in the middle such as the following image.