6 1/4" Pillar Needle File Cut 4 Grobet Swiss Precision is a file with the rectangular in shape, does not taper in width or thickness. The flat portion of the file is double cut, the edge of the file is single cut. Total length of the file (including the handle) is 6 1/4" (160 mm), the actual cutting portion of the file is approximately 3" (76 mm). Width of the file is 0.23" (5.80 mm) with a thickness of .073" (1.85 mm). Cut 4.