Set includes optional anvils with 60 degree threads.
Each anvil can be used for both metric and unified external threads.
The micrometer anvil is fully adjustable by the knurled knob.
64-48TPI/0.4-0.5mm, 44-28TPI/0.6-0.9mm, 24-14TPI/1-1.75mm, 13-9TPI/2-3mm, 8-5TPI/3.5-5mm, 4.5-3.5TPI/5.5-7mm.