Extended-length center drills are longer than standard center drills and can access hard-to-reach workpieces. These center drills have a plain tip, which is the standard choice for creating center holes in a piece of stock to prepare it for turning between centers on a lathe.Center drills consist of a pilot drill and a countersink. They are used to create holes at the center of a piece of stock so it can be turned between centers on a lathe in metalworking applications. The pilot drill creates a small hole in the stock and the countersink expands the hole, leaving a small gap at the bottom of the hole that helps protect the lathe's centers from damage when the stock is turned on it. Specifications: Item: Center DrillCountersink Style: PlainMaterial - Machining: High Speed SteelFinish - Machining: TiNCountersink Angle: 60 DegreesCutting Direction - Machining: Right HandMeasurement System: WireDrill Size: #4Drill Point Dia.: 1/8\"Overall Length: 6\"Trade Size: Long"