MTH-ISO (int. & ext.)
Helical Thread Milling Inserts for ISO Metric Threads

MTH-UN (int. & ext.)
Helical Thread Milling Inserts, for American Full Profile Threads for General Applications

MTH-W (int. & ext.)
External & Internal Whitworth (BSW, BSF, BSP) Helical Thread Milling Inserts, for Fittings and Pipe Couplings

MTH-BSPT (int. & ext.)
Helical External & Internal Thread Milling Inserts for BSPT Thread, for Steam, Gas and Water Pipes

MTH-NPT (int. & ext.)
External & Internal NPT Helical Thread Milling Inserts, for Steam, Gas and Water Pipes