The Sinclair Gen. II Flash-hole Uniforming Tool features stainless steel construction and chip clearance slots which alleviate the tendency of the tool to collect chips in the end of the cutting shaft. A couple of turns will remove any burrs and leave a small chamfer on the inside edge of the flash hole. Flash-hole deburring is a one-time operation best results are on new virgin brass. This tool is available as a cutting shaft and the tapered guide as a standalone unit, or it can come with a large grip handle.
