These bits are perfect for drilling a barrel in preparation for installation of a barrel liner. Interchangeable pilots ensure a proper cut for excellent results. Steel.Includes 22 caliber pilot
Material: Tool Steel
Bit may be resharpened
Drill bits are standard "jobber" length. Bit and bushing is used to drill the rifling out of a barrel to install a sleeve inside the barrel (replacing the rifling).
Drill bit extensions will be necessary for other than short handgun barrels and extensions are usually made by welding steel rod to the end of the drill bit.
Pilot drill bit bushings are for use with ECT drill bits only
Overall length is 6"
Pilot length is .575"