OOTDTY Features:9 flutes, straight shank, 9SiCr. Installed in the lathe for cutting of metal tools. Straight flute hand reamers is used in ferrous metals and most nonferrous metals. The reamers is precision ground with straight flutes to produce smooth, accurate holes while delivering long tool life. Reamer for reaming holes have been drilled after processing (or reaming) on the workpiece, mainly to improve the precision of the hole, reducing its surface roughness, is finishing and semi-finishing tool for the hole. Specifications: Precision: H8Material: 9SiCrDiameter: 16mm, 14mm, 12mm, 10mm, 8mm, 6mm, 5mm, 4mm,3mm/0.63", 0.55", 0.47", 0.39", 0.31", 0.24", 0.2", 0.16", 0.12"Total length: approx. 98mm, 94mm, 84mm, 68mm, 60mm, 54mm, 49mm, 42mm, 33mm/3.86", 3.7", 3.31", 2.68", 2.36", 2.13", 1.93", 1.65", 1.3"Cutting length: approx. 160mm, 155mm, 135mm, 120mm, 104mm, 93mm, 86mm, 75mm, 61mm/6.3", 6.1", 5.31", 4.72", 4.1", 3.66", 3.39", 2.95", 2.4"Quantity: 9 Pcs/1 SetNote:Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail PackagePackage Contents:9 x Hand Reamer