Hand Reamers Are Made Of High-Speed Steel And Are Generally Used By Hand For The Final Sizing Of Holes. The Square On The Shank Is Suitable For Holding In A Tap Wrench Or A Vise Depending On Whether The Reamer Or The Part Is Rotated. A Long Starting Taper Is Ground Into The Reamer For Easy Entry And Accurate Alignment. . The Straight-Flute Hand Reamer Is Recommended For Most Hand Reaming Applications. The Spiral-Flute Hand Reamer Is Recommended For Applications Where There Is An Interrupted Cut Such As A Keyway