6 , straight , alloy tool steel. installed in the lathe for cutting metal tools.Straight flute hand reamers has been used in ferrous metals and non-ferrous metals.The reamers is precision ground with straight to , holes while delivering long tool life.more spacious for reaming holes are drilled after processing (or reaming) on the workpiece, mainly improving the precision of the hole, reducing surface roughness, finishing and semi-finishing tool for the hole.colour:Silver grayMaterial:HSSsize:4/5/6/8/10mmPackage Contents:5*Hand ReamerOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.