3/8" Size 5/16" Shank 5/32" Pilot Hole Diameter High Speed Steel Interchangeable Pilot Type Counterbore JIG When used with the included

When used with the included adapter

CNC machined lid for ultimate vacuum and durability

to allow the black oxidation to set

engine cylinder shaft bore 5/8 & 7/8 available

2 Jaw Mounting Positions

3/8" Size 5/16" Shank 5/32" Pilot Hole Diameter High Speed Steel Interchangeable Pilot Type Counterbore JIG When used with the included3 8" Size 5 16" Shank 5 32" Pilot Hole Diameter High Speed Steel Interchangeable Pilot Type Counterbore Interchangeable Pilot Type Counterbores from TTC Production. Presenting here are short series of counterbores to enlarge holes on any ferrous or non ferrous workpiece. Ask any small job machinists and they will recommend you TTC counterbores for your machining requirements. These bars are made up of high speed steel and last long in industrial