1.量面鑲裝硬質合金，更具耐磨性 With carbide measuring faces,more wearable. 2.200mm以上規格可帶微動滾輪 With thumb roller for range 200mm or more. 3.可進行外尺寸、內尺寸、深度尺寸及臺階尺寸測量 Can measure OD,ID,depth and step.
