Equipped with thick carbide tips and negative shearangle design, CMT Mortising bits guarantee you a flawless performance.Mortise perfect hinges with no splintered edges or rough bottoms. Theyalso make an easy job of piece work in both natural wood and woodcomposites. Fit most popular mortising jigs. The CMT mortising bit withtop bearing guide is the perfect bit for sign making or any kind oftemplate work.