While the standard Spiral Flush Trim Bits are produced from one-piece milled solid carbide with the bearings mounted on the end and the shank diameter being identical to the cutter diameter; the cost of taking solid carbide rod and turning down the mounting shaft to be smaller than the cutting tip to allow for shaft-mounted bearings would be cost-prohibitive and wasteful. The Torquata Flush Spiral Pattern Following Bits solve this issue by producing the cutting body from milled solid carbide that is then brazed onto a steel shaft which is then CNC-machined and balanced to standard shank sizes. Rather than offering upcut and downcut versions, the pattern following bits have a compression (combination up and downcut) profile which ensures optimal, crisp and clean edges both top and bottom of the material. Due to the brazing of the carbide cutter on to the steel shank, the Flush Spiral Pattern Following Bits cannot be used for plunged cuts and must only be used for trimming cuts up to 1/2 the diameter of the cutter. 1/4in shank spiral compression pattern follow bit 12.7mm diameter Specifications Shank Size – 1/4in Cutter Diameter 12.7mm or 1/2in Bearing Size – 1/2in Cutting Height – 25.4mm or 1in Overall Length – 70mm