These spiral mortising router bit sets are constructed from high speed steel to run cooler and last longer. Ideal for creating mortises, grooves and dadoes in softwoods, hardwoods, plywood, and composites.

• Precision ground spiral design for fast material removal
• High speed steel runs cooler, lasts longer
• Includes sizes 1/4 in. x 3 in., 1/2 in. x 3-1/4 in., 3/8 in. x 3 in.
• Designed for use with router or drill press