JewelStik Diamond Files Grit:270 Grit / 600 Grit The Round Arkansas file is

The Round Arkansas file is available in a smaller 4" length with 1/4" diameter and the larger 6" length with 1/2" diameter

The Single Prong drives into a log

it is helpful to also use a Digital Angle Gauge because the Adapter significantly impacts the calibration of the angle markings

there is a fourth with a suede kangaroo leather strop mounted on one side

JewelStik Diamond Files Grit:270 Grit / 600 Grit The Round Arkansas file isDiamond Abrasive The JewelStik Files have diamond abrasive on both sides and are suitable for use on steel or ceramic knives and tools. Whether you're looking for fast material removal or to finish a sharp cutting edge, these files will do the job. Ample Diamond Surface The JewelStik File surface is 5" long by 3 4" wide, providing plenty of room to work. Whether your sharpening a knife, an axe, or any other edged tool, you'll have no shortage of space