ITEM NAME:High Speed Steel Straight Shank 5mm 6-Flute Hand Reamer 3.3" Length I6E4 High Speed Steel Straight Shank 5mm 6-Flute Hand Reamer 3.3" Length I6E4 Product Name : Hand Reamer;Flute Number : 6 Flute Length : 45 mm / 1.77";Flute Diameter : 5 mm / 1/5" Square Mount Size : 4 x 4 mm / 0.16" x 0.16" (L*W);Total Length : 85 mm / 3.3" Material : HSS;Color : Sliver Tone, Dark Brown Weight : 11g; Structural Reamers used in ship and bridge building and boiler manufacturing where steel plates and shapes have punched or drilled holes that are undersize and rough. Also used to ream holes in assemblies to obtain proper alignment and size for accepting rivets, bolts etc. Package Content : 1 x Hand Reamer Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.