FLUSH TRIM 1/2 DIA 1/2 SHANKUse this bit for template or pattern work where the workpiece is unusually thick. The two-flute configuration cuts fast and produces a smooth finish. For a superior finish, use the three-flute version. Twin bearings on selected tools provide better contact with reference edge and more stability in the cut. AMAX Extended Life Features: 200% longer life time even when working with abrasive materials; Superior geometric design; Advanced grinding technology that improves the carbides' resistance to wear; and Super clean cuts.