OOTDTY Features: 9 flutes, straight shank, 9sicr. Installed in the lathe to cut metal tools. Straight flute hand reamers are used in ferrous metals and most non-ferrous metals. Reamers are precision ground with straight flutes to produce smooth, accurate holes while ensuring long tool life. The hole reaming reamer was drilled after machining (or reaming) the workpiece, mainly to improve the precision of the hole, reducing its surface roughness, is a tool for finishing and semi-finishing the hole. Specifications: Precision: H8Material: 9SiCr Diameter: 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: 9pcs/1setNote: Please allow 1-3mm error due to manual measurement. Pls make sure you don't 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 Package Package Content:9 x Hand Reamer